Shop our Airplanes Products Shop our Surface Products
dmrcflyr2's blog View Details
Posted by dmrcflyr2 | Jun 26, 2016 @ 06:48 AM | 1,027 Views
I noticed that I did not have many if any videos of these two engines. Yesterday I decided to take them out and do performance runs on each. The release to the market of these two engines is quite different. The 40X was reviewed in 1978 and the SS40BB around the 1987 time frame.

The curious thing is that the 40X features a more modern single piece crankcase design as opposed to the two piece of the 40BB. The two piece crankcase is an older design seen in the late 70's-80's OS FSR series engines.

Both engine turned the same 11x6 APC at nearly the same WOT RPM. Now I did not really lean either to optimum, but they were close. You can see the 40BB weighs in at 1 ounce less than the 40X.

Enya 40X vs SS40BB (7 min 30 sec)

Posted by dmrcflyr2 | Jun 18, 2016 @ 11:38 AM | 1,408 Views
Well as promised I ran this engine and shot some videos of it. I had some difficulty initially getting it started and it was completely my fault and not the engines. I neglected to follow the instructions for the initial needle valve setting and opened it too much. This resulted in a flooded engine that would not start.

Once I cleared the flooded condition and set the needle properly it was quite uneventful after that. The engine starts easily, runs well, and has good transition from idle to WOT. I have the needles tweaked pretty well in the second video. I might be able to lean the low end a click or two more, but for the most part this engine is ready to drop into an airplane.

It runs just like my first one did in 1989, very strong. I took a few pictures inside the engine after my 4 runs as well. As you can see it still looks new.

ASP 46A the first run (10 min 30 sec)

The performance run.
ASP 46A Performance run (4 min 34 sec)
...Continue Reading
Posted by dmrcflyr2 | Jun 15, 2016 @ 05:32 PM | 1,546 Views
Completely uncharacteristic of me, I bought another 'Made in China' engine. I was perusing eBay last week and found a cache of 90's vintage, new old stock ASP engines from a fellow in Portugal. These are the European marketed versions.

As for the nostalgia, the ASP 46 two stroke engine was about the 3rd or 4th engine I ever purchased. I bought my first in 1989 and installed it in my first Great Planes Super Decathlon 40. It was a nice combination and powered that airplane quite well. When I crashed that airplane I built another and powered this one with my first 4 stroke engine, an Enya 80-4C.

So I placed a bid at the lowest price figuring if someone wanted it more than me they could have it. Someone did and I did not bid again. The next day I received an email from eBay stating I had a second chance at this engine for the same amount. I am unsure if the original deal went south or this fellow just has a good supply of these engines. Either way I ordered it this time.

Well the engine arrived today and here are some initial pictures of the engine. It was a bit stiff and once again I question the quality of the oil the early Chinese engines were shipped with. Clearly the engine was NIB and unrun but it was stiff. I added some oil and a bit of heat and it freed up. I'll be putting it on the test stand this weekend....Continue Reading
Posted by dmrcflyr2 | Jun 11, 2016 @ 05:17 PM | 1,689 Views
I ran these engines today back to back. Both have about the same amount of run time. The Magnum had six tanks of fuel through it and the OS roughly the same amount. When I purchased the Surpass it was labeled a used engine but when I got it I found no real evidence that it had been run more than once. I have put about 6-7 tanks of fuel through it now.

The Magnum four strokes are 'clones' of the Surpass series of OS engines. These are the two closest displacements that I have between the two manufacturers so I thought a comparison would be fun.

Surprisingly the OS turned the same RPM as the larger displacement Magnum. Now I really did not REALLY try to peak each engine out but they are setup very similarly. The biggest difference between the two engines is that the OS has an airbleed carb whereas the Magnum has a twin needle setup. I was able to get the Magnum a bit better dialed in on the low end than the OS. Both ran and started easily by hand and had good transition.

Magnum XL 52 vs OS FS-48 Surpass (10 min 55 sec)
...Continue Reading
Posted by dmrcflyr2 | Jun 11, 2016 @ 08:24 AM | 1,983 Views
What is with me lately? The last 5 engines I have acquired have been of Chinese manufacture instead of Japan. In all honesty I have nothing against the Chinese made engines as long as I have no issues with them. Clearly the quality isn't up to par with any Japanese made engine in any respect, however that does not mean they cannot provide years of trouble free operation at a great price.

The latest engine I look at now is the Magnum XL 52 RFS. I purchased this engine here from a great RCG member. It is a new and unused engine less the box and accessories. Again the external appearance isn't as refined and clean as the OS counter parts this is a clone of but it is a good runner. I estimate that this engines date of manufacture is the late 90's early 2000's based on the fact that it has no blue valve cover. This looks more like the ASP sister engine.

I ran this engine for the first times today and was not disappointed at all. It took a prime very easily and hand started immediately. I did take a look inside the back plate and cam gear are before running. This engine was clean as a whistle and gleaming inside. Not one sign of corrosion or rust at all despite the theoretical age of the engine. I was shocked to see that the crankshaft incorporates a Woodruff for the thrust washer. This is a trait more indicative of the older OS four stroke engines. I did not see this on the ASP FS 80 or Magnum XL 70.

Magnum XL 52 RFS first run (7 min 26 sec)

Magnum XL 52 RFS second run (7 min 40 sec)

Posted by dmrcflyr2 | Jun 05, 2016 @ 10:19 AM | 1,603 Views
So I recently purchased a Magnum XL 70RFS engine from eBay. Unfortunately one of my poorer purchases. I paid a bit more than I should have and the condition wasn't quite as good as the ad seemed to indicate. Oh well, you get some great buys and some not so great buys.

I am not saying the Magnum engine is a lemon, a poor runner, or anything like that,. It is just it isn't as good of a deal as I thought I was getting. With that said I have it listed in the classifieds to try to recoup some of my money. But that isn't the purpose of this blog post. The purpose is to do a quick comparison of the XL 70 to it's sister engine the ASP FS80.

These engines are made in the same factory, by the same company in China, Shenzhen Sanye Precision Machinery Co., Ltd. That is not to say the engines are identical because they are not. They have different crankcase castings for the specific brand, ASP, Magnum, etc. Along with that I have taken some pictures showing some of the other differences between these 'sister' engines that I think are interesting. I guess I figured since I had one of each why not show these differences side by side.

One of the biggest differences that I noted in my videos is the LACK of a throttle stop screw on the Magnum carburetor. This, to me, is a big deal since I run tons of engines on the test stand, I always set the throttle stop screw to a point where I can get the minimum idle without killing the engine.

Another big difference is the intake...Continue Reading
Posted by dmrcflyr2 | May 22, 2016 @ 02:46 PM | 2,166 Views
Well this engine does run and it runs quite well really. I have seen a few other videos of these engines running and this one runs just like those. For a Chinese made engine from the early 90's is is quite nice really. I have a total of three tanks through it now.

And to prove my assertion about it having one run on it from my previous post. I took the head off after the second tank to see what the valves looked like, Now the first image during dis-assembly is a snapshot taken from the video and isn't the best quality compared to the picture taken after the runs. The second snapshot from the video is showing what they looked like after I cleaned the exhaust valve. They looked the same. I think it is clear that I was correct. It was NOT a NIB engine when I got it.

There is considerably more carbon on the exhaust valve after my two runs than when I opened it up. I think it was merely fired up for about 10-20 seconds if that and then just put back into a box for however many years.

ASP FS80 First run (4 min 57 sec)

ASP FS80 the second run (7 min 50 sec)
...Continue Reading
Posted by dmrcflyr2 | May 22, 2016 @ 10:56 AM | 1,753 Views
As promised last week, I did open this newly acquired engine up. It was sold to me as a NIB engine but subsequent internal inspection tells a different story. I initially was going to open it up to check for metal shavings from manufacturing and general quality. This is due to this being an early ASP engine made in China. These engine were not known for being of the best quality and I had heard stories of folks finding metal shavings inside new engines.

Although I did not find any metal shavings I did discover this engine was not NIB and never seen fuel. I could tell from the exhaust valve. It was a slightly different color on the face and at first I just dismissed that. But after dropping the valves I could see that discoloration going up the stem of the valve. This is clear proof that this engine had been run at least once before,

I completely disassembled this engine and pulled the bearings. They did not feel very good and I immediately ordered another set from RCBearings. I did lube them up and work them a bit and they felt much better. I did decide to just re-assemble the engine with these bearings and get a run or two in to see how the engine performs. Once the new bearings arrive I will be installing them.

This will also give me the opportunity to test the theory of how many runs this engine really had before I bought it. I cleaned the exhaust valve up to look like new and today I have run the engine 3 times. Those videos to follow.

It turns out this video just so happens to be my 300th video on my YouTube channel!

The first run videos will follow.

ASP FS80 A look Inside and my 300th YouTube Video! (13 min 7 sec)

Posted by dmrcflyr2 | May 17, 2016 @ 05:24 PM | 1,966 Views
Well here is yet another departure for me. I just purchased a CHINESE made engine.... While I normally, of late anyway, stick strictly with Japanese made engines, I made an exception here.

The ASP line of engine hit the market about 1989, at least that's when I bought my first one. I believe the FS 80 was ASP's first foray into the 4 stroke market as direct competition to the OS 70 Surpass. The age of this engine, it's rarity, and the fact that I got it NIB for under $100 is why I bought this engine. I figured if I was the first person to run it and break it in I couldn't go wrong.

As you can see this is a direct clone in design of the OS Surpass line of engines from the time period. Obviously I am not expecting the same quality as I would from an OS engine and I wasn't disappointed in that respect. The external appearance and casting is ...... rough to put it mildly.

Because of the fact that this is a Chinese made engine from 1993, the year this engine hit the market, I will be doing some tear down of this engine before running. I have heard of and seen metal shavings in some of the early engines from China. I want to make sure things are as right as they can be with this engine before I run it. Another reason is that there are no replacement parts for this engine.

Here are my initial pictures of this engine. This weekend I will be shooting a "Look inside" video of this engine as I disassemble and inspect the internal components....Continue Reading
Posted by dmrcflyr2 | May 08, 2016 @ 10:21 AM | 1,987 Views
So just for the fun of it I pulled out the three 45/46 size 2 stroke engines that I have. The engines being a Tower Pro 46, an OS 45 FSR, and an OS 46 SF.

1. The Tower Pro is a new engine not fully broken in. This is about the 4th tank run through it.
2. The OS 45 FSR is a used engine of unknown run time.
3. The OS 46 SF is a used engine of unknown run time.
4. All engines running the same APC 10x6 prop.
5. All running Morgan's Omega 10% fuel
6. All run on the same day, time, weather conditions.

This is purely for fun and is not meant to be a scientific

I thought the results were somewhat interesting. The OS 45 FSR for many years was the benchmark engine; I guess until the 46 SF came out anyway.

The 45 FSR really could not compete at all. I had it maxed out at 12,240 PRM and further leaning did not result in anything but a drop in RPM. It was a relatively low run time engine, so wear and age should not have played a role in its performance.

The 46 SF was obviously the king of this comparison. Again, a used engine, but a great runner nonetheless.

Now the Tower Pro could have been tweaked a bit more and I'm sure it would have turned pretty close to the 46 SF but I really did not lean it out fully.

All in all it was a fun comparison.
Tower vs OS performance runs (5 min 30 sec)

Posted by dmrcflyr2 | May 08, 2016 @ 07:44 AM | 2,151 Views
The nice used FA-56 I just purchased from RCG now has new bearings installed. Just a quick video showing it running after the replacement. It is just another sweet running Saito engine.

Saito FA-56 first run after bearing replacement. (5 min 22 sec)

Posted by dmrcflyr2 | May 07, 2016 @ 03:51 PM | 2,972 Views
This engine has waited possibly 30 years for this! Introduced to the market in 1983 and this being an un-run engine, who knows, maybe it has waited that long.

As usual with an OS engine of this vintage, there was nothing difficult about getting it running. I over primed it initially, but once that was cleared it fired right up. My first tank was spent running it between 4100 RPM and 6500 RPM alternating between the settings. This comes directly from the OS manual.

My second tank I began to lean it out just a bit peaking it at about 8500 RPM. It obviously needs more tanks and gentle running before reaching peak power but even on the second tank the idle was quite good. The airbleed screw was set at the factory and I didn't touch it. It was covering about half of the hole. All in all no surprises here, just another great running high quality OS engine.

OS FS-61 First drink of fuel (4 min 31 sec)

OS FS-61 Second run (6 min 1 sec)
...Continue Reading
Posted by dmrcflyr2 | May 05, 2016 @ 06:20 PM | 2,023 Views
I have two recent acquisitions scheduled for the first runs by me this weekend.

The first is a very nice used Saito FA-56. This actually will not be the first time I ran this engine. I did a box to the bench review of it last weekend. The subsequent look inside showed the rear bearing was quite noisy and in need of replacement. It was a metal shielded bearing with the shields on both sides. This is not what Saito would install in this engine and the PO that installed this obviously did not know this. Either way it was quite rough and has been replaced now. So this will be the first run after bearing replacement.

The second engine is a very nice, never seen fuel 1983 OS FS-61 four stroke engine. I was pleasantly surprised to discover that this gem I found on eBay was a never run engine. I will be starting the break-in of it this weekend.
Posted by dmrcflyr2 | May 04, 2016 @ 07:01 PM | 2,567 Views
So I have been taking some chances on buying engines from eBay in the last few months. I have been very happy with my purchases. My latest purchase for a whopping $52 was a vintage 1983 OS FS-61 four stroke engine.

This engine was listed as used and the box was very worn and tattered. It was not a complete package either. It came only with the box, a print out of the instructions manual, a spare head shim a few o-rings and a new piston ring. I was not disappointed in these things, after all, this was a used engine right?


I was going to make this a subject of another box to the bench review but I would not have been able to do that until Saturday. I decided to do A Look Inside instead and boy am I glad I did. As it turns out this engine is NEW and never run!!! What a great surprise! I was going to run this as a used engine, but now knowing it has never seen fuel I need to treat it very differently. The video shows the internal condition, but what it can't show is the smell of the tooling oil from the factory. There was not a single hint of glow fuel residue or smell in this engine at all!

OS FS-61 A Look Inside (10 min 58 sec)

Posted by dmrcflyr2 | Apr 24, 2016 @ 02:56 PM | 2,410 Views
I bought my first Tower Pro 46 back around 2000ish, but I had several of the sister engines, the GMS 47, prior to that. Now of late I have been selling off all non-Japanese made engines. I am primarily interested in Saito, Enya, and OS engines for their quality, reliability, and performance. But when I saw this new never run engine on eBay for $26 I knew I had to have it. That was the best $26 I have spent in a long while.

Granted it is not a Japanese made engine but having owned several before I do know they are powerful and fairly reliable. Now this one gave me a bit of trouble initially today. I could start it and it would run for about 6 seconds then die. As it turns out the low speed needle was set too lean either at the factory or by the previous owner. I am certain the engine had never been run before due to the look of the inside and smell of the engine.

Once I got the low speed needle ironed out tuning was fairly easy. Now it hand starts easily and runs quite well. I only put two tanks through it today but I would feel comfortable putting it in my Kaos as it is.

Tower Pro 46 First runs (9 min 37 sec)

Posted by dmrcflyr2 | Apr 16, 2016 @ 05:24 PM | 2,233 Views
I mounted this engine to the test stand today and began shooting the video. It was shortly after the first run attempt that I relearned something about glow engines and glow plugs.

About 2 months ago I bought several sleeves of Enya #3 glow plugs. Why would I do this? Because these plugs are some of the best you can get, and unfortunately no LHS stocks them anymore. So I have to order them and I run primarily 4 stroke engines. I have read many posts and reviews stating that these plugs are great in 2 stroke engines as well. Thus far I have had the same experience until the last two OS engines.

I have used the Enya plug with great success in a Webra Speed 61, an OS 40 FP, my OS 40 FSR, etc. But this 45 FSR and my 46 SF engines simply do not like these plugs for some reason.

Now back to the original story line, running this 45 FSR engine. The engine would not hold full throttle at any richness setting of the high speed needle, nor would it idle at all. After fooling around with carb settings and the engine running poorly, I finally decided to change glow plugs. Now the Enya #3 I installed was brand new too, so I was not initially questioning the plug for the poor running results. I pulled a plug from my Enya SS40BB 2 stroke engine and installed it into this engine. Suddenly the engine would hold full throttle settings and would actually idle without dying.

I believe the plug I used was a McCoy MC-59 as I had purchased some for the few 2 stroke...Continue Reading
Posted by dmrcflyr2 | Apr 13, 2016 @ 05:47 PM | 2,907 Views
I just scored a really nice seemingly low time OS 45 FSR. This engine was introduced to the market in 1978 as an increased bore of the 40 FSR. I could not find a review on this engine so I have little more factual information on it. My engine is the ABC version and I opened it up as soon as I got it for my normal inspection.

The compression was excellent and the looks of the crankshaft counter weight and rear bearing show NO rust or corrosion. The bearings still feel very smooth, but I have no idea if they are the originals. Nevertheless I will not be replacing them at this time.

The top of the piston also indicates a very low run time engine. The odd thing about the 45 FSR is that I seldom see them for sale or hear anything about them, I can only assume that since it is an OS engine from the late 70's that it is a very high quality mill. On to the pictures........Continue Reading
Posted by dmrcflyr2 | Apr 10, 2016 @ 08:35 AM | 2,504 Views
This post shows the first run after rebuilding this engine. It really is a sweet engine. It may not be a powerhouse by today's standards or even in 1981 when it was released, but it is a very good running engine. It started on the first flip. This engine did take some considerable prime to get started even on subsequent runs I have done today.

Unfortunately, the age and low power do not make this a very attractive engine to most folks in the glow market today. Everyone seems to value absolute power now over high quality. It is my belief that the quality of this engine is unmatched. In my mind, this is an example of the pinnacle of OS quality as are all of their engines from the 80's through mid 90's.

As such it will not be sold , plus it being a gift to me, it has a bit more meaning and value.

OS FS-40 First run after rebuild (6 min 46 sec)

OS FS-40 clips (2 min 31 sec)
...Continue Reading
Posted by dmrcflyr2 | Apr 09, 2016 @ 06:22 PM | 2,741 Views
That would be Kimchiyuk! So I have sold this member a few engines, bought a few from him, and we have corresponded several times. Well I was about to lay in my recliner and take a nap when I here the postal truck deliver the mail. I figure I better get that before I nod off. Out to the mail box I go and when I open it there is a small box! WTH? The engine I just bought from eBay could not be here yet.... What is this. I see the return address and wonder if I made a purchase I did not remember.

So I anxiously go into my room and open this package. I find a completely disassembled OS FS-40 four stroke engine! Wholly moley! I love engines, let alone totally disassembled ones! There was this note also....

In summary it stated that Dustin had been working on this engine but lost the desire to complete it. Knowing I am an avid engine lover, he sent it to me. The note went on to say and I quote, "Keep it, sell it....It's yours."

I quickly scanned the box and parts and it looked like everything was there. The caveat being the piston pin was still firmly attached to the piston. These can be quite tricky to remove. OS engines require the cylinder sleeve to be pulled out and then a hole in the casting is exposed allowing careful extraction of the piston pin. A task much easier said than done especially if the engine has sat for any time at all, or has not been run in a while.

Long story short, it took considerable oil, heat, a soak in LA's Totally...Continue Reading
Posted by dmrcflyr2 | Apr 06, 2016 @ 12:19 PM | 3,169 Views
Today's post is a blast from the past. I recently purchased a NIB OS 40 FSR ABC 2 stroke engine. This engine was introduced to the market in 1975 and had a production run through the early 80's. I am not entirely sure when this engine was discontinued but the SF series of engines replaced it. The 40/46 SF engine hit the market in 1987 so this engine was available up until that time at least.

The box artwork looks to be from the early 80's so I have a real classic here. Today I decided to shoot some videos of how I setup a 2 stroke engine for the first time running it. I have 4 total videos to include the first run and the third run where I begin to set the high speed needle, followed by setting the low speed needle for proper idle.

This post can also be viewed on my website along with many other instructional videos.

Initial setup
OS 40 FSR Setup for the first run (8 min 51 sec)

The first run
OS 40 FSR First run (7 min 37 sec)
...Continue Reading