Shop our Airplanes Products Drone Products Sales
dmrcflyr2's blog View Details
Posted by dmrcflyr2 | Jun 11, 2017 @ 04:19 AM | 1,834 Views
For an engine that had a very long production run, these are seldom seen on the used market. I believe that it was released around 1971 and I read that it had a run of over 40 years. So where are they? Just in peoples collection, never to be sold? Certain parts are still available on eBay, but no real critical ones like the apex seals. I have found mainly screws and drive washers. Why am I rambling on about this particular engine? Because I was fortunate enough to get one in a trade. It cost me a very nice Saito FA-91S which I thought was a fair trade. I mean I could list a wanted ad for a 91S and most likely have one in a week so I am not too concerned about replacing this engine.

As it turns out this is the first edition. The later models had some slight differences.

I was very glad that the fellow I was trading with gave me the opportunity to inspect this engine BEFORE I committed or mailed the 91S to him! Well within 3 minutes of opening the box and inspecting it, my 91S was packaged in the same shipping box and ready to go to a new owner. I was not planning on disassembling this classic but a closer inspection of the fasteners showed several things. First, it had been apart before and secondly some of the fasteners were in terrible shape. Heads completely stripped out on at least 5 of them. I made the decision to open her up after I placed an order some some of the few spare parts available, mainly screws, a rotor, and apex seal springs. As of...Continue Reading
Posted by dmrcflyr2 | May 26, 2017 @ 05:42 AM | 3,149 Views
Well I have been running glow engines for many years, but never a diesel. Well that has all changed now. I have much to learn regarding this type of power but I think I am getting the learning curve down to a better level. I had a very nice OS 40FP on hand that I had purchased from eBay over a year ago. I decided to try the MECOA diesel head as opposed to the Davis Diesel offerings for cost reasons. After purchasing all of the other items required, I set out to run it for the first time, video #2. I think this beats the hell out of all the damn quad videos in the Blog section. JMO

Video #1 intro
OS 40 FP Diesel Conversion Part 1 (5 min 42 sec)

Video #2 The first run
OS 40 FP Diesel Conversion Part 2 The First Run (8 min 44 sec)
...Continue Reading
Posted by dmrcflyr2 | Apr 10, 2017 @ 05:50 AM | 3,672 Views
A very awesome fellow RC modeler sent me a Value Hobby Easy Stik 60. This makes the 3rd one I have had. The first two were lost due to crashes. The first being a 2.4GHz loss of bind failure and the second was an elevator control rod failure. Anyway, I am very excited about having another one of these airplanes as they are excellent fliers. A tremendous value for the money too. Please see my video playlist as I assemble this nice ARF.

First video is below. The remaining ones can be seen at this link,

Value Hobby Easy Stik 60 A Look Inside (6 min 45 sec)

Posted by dmrcflyr2 | Mar 23, 2017 @ 11:15 AM | 4,327 Views
Of four stroke engines you dirty minded people!! I recently scored two of the best deals in a long while. (Besides of course a free engine.) Although these were not free they were under $65 for the pair. Acquired separately from different parties in the last week. The Enya 46 looked to be in really bad shape, but once cleaned up, it turned out to be pretty darn nice. The 48 Surpass looked just like the picture, but still needed some internal cleaning.

Both engines were completely disassembled and parts cleaned in my Harbor Freight ultrasonic cleaner with 1 part LA's Totally Awesome cleaner and 2 parts hot water. The Enya needed some parts but fortunately I had them on hand. The Surpass really didn't need anything but a screw that I had stripped the head on trying to loosen it. The bearings in the OS could have been replaced but after cleaning and oiling I thought they would last a bit longer. besides I did not have the right bearings on hand.

The Enya has been run, the OS has not yet. Both have very good compression and should provide many more years of service. below is a video of the Enya as I disassembled it. I do glow engine repair, cleaning, rebuild. So if you have an old tired engine and just don't feel like messing with it, send it to me and I can refurbish it for you. I have a playlist on my YouTube channel showing customer engine repairs.

Enya 46-4C A Look Inside (4 min 43 sec)

Posted by dmrcflyr2 | Mar 19, 2017 @ 04:21 PM | 4,390 Views
This is the second video using the RunCam II mounted to my Decathlon. The first was poor because I did not turn the image flip setting off. It is off this time and I have a much better video to show for it.

RunCam II Another Try (7 min 21 sec)

Posted by dmrcflyr2 | Mar 19, 2017 @ 04:19 PM | 4,318 Views
I was contacted by a fellow modeler a few weeks ago. He had a nice 170R3 that needed some bearings and check out. He thought maybe a valve was stuck or one cylinder was light on compression. He asked if I would be interested in fixing it up for him. My response was HELL YES! NOw when this engine arrived it looked pretty well cared for as you can see in the pictures.

Once I began the disassembly I quickly discovered the issue with the engine. It had stuck cam followers on two of the 3 cylinders. I am documenting this rebuild on my YouTube channel. I think the videos tell a bit better story than I do. Check them out.

Saito FA-170R3 Customer Rebuild Part 1 (9 min 22 sec)

Posted by dmrcflyr2 | Feb 26, 2017 @ 02:11 PM | 5,122 Views
Well just over 1 year after purchase this airplane makes its maiden flight. I have powered it with an Enya 80-4C engine. The same version engine I used way back in 1989 when I was flying the Great Planes Super Decathlon. What a great combination this is. The airplane required only a couple of clicks of down trim. Fairly strong winds right down the runway made the first flight a bit anxious, but that feeling was soon gone. Just a great flying airplane.

Phoenix Decathlon Maiden Flight (8 min 43 sec)

Posted by dmrcflyr2 | Feb 08, 2017 @ 05:57 PM | 5,325 Views
I have a complete set of awesome 1980's vintage 120 size 4 stroke engines now. All but one of these came from this forum. Some were solicited and some were not. All I can say is that RCG has some of the most awesome members, hobbyists, and friends around. A huge thank you to Jim, Chris, Jeremy, Michael, and Scott for either selling, assisting, or providing these engines to me! This is a set I am very proud to own and do not plan on parting with. Thank you guys!
Posted by dmrcflyr2 | Feb 04, 2017 @ 04:44 PM | 5,473 Views
A very good friend has sent me one of his FOUR Saito FA-120 engines to evaluate, run, and possibly purchase. Now this was the first 120 Saito mass produced and sold. It was released around the 1981-1982 time frame. I have found very little information on this engine aside from a review by Clarence Lee, , and the notes from departed Bill Robison,

I have been unable to find out much more about this engine. I started a thread about them on the Engine forum and few people have commented. It would seem that this is a rather rare engine. I do see one from time to time on eBay but not very often. I want to own one just for the sake of it being so rare. Here are a few videos I have made on this engine. It runs quite well.
Saito FA-120 A Quick Look (5 min 24 sec)

Volume 13 Box To The Bench Saito FA-120 (8 min 8 sec)
...Continue Reading
Posted by dmrcflyr2 | Jan 23, 2017 @ 05:25 AM | 5,244 Views
My last post began this story. This post just shows the story in the form of videos, 17 in all thus far. From my first look at it all the way through to the final issue I am having getting it to run perfectly.
Posted by dmrcflyr2 | Jan 21, 2017 @ 04:51 AM | 6,723 Views
For those BLOG readers that do not necessarily read the glow engine thread forums, here is a synopsis and videos of this engine. A short time ago I posted about 120 size 4 stroke engines from the early 80's. Those being from Saito, Enya, and OS. Well I received a couple of comments to that regarding the fact that I was missing a key player from that group, the YS F-120.

Quite honestly I did miss that. In fact I never even considered the YS F-120. I had never owned a YS engine before and honestly I was not sure when the F-120 was released. As it turns out an incredible fellow, Jim, has three of the these vintage engines that he acquired from another source. These engines had been stored in a hot humid Houston shed for many years untouched. Jim, being the awesome man he is, sent me one of these engines to clean up and get in running order. I gladly accepted and began the task.

Now YS engines are a different breed of glow engine. More complex than any other 4 stroke engine of the group I mentioned. I had some research and homework to do. Now I quickly found that documentation of these engines is somewhat difficult to find and limited to a few documents. Why this is in unknown since these engines are still in production. Well not the F-120, but the brand. I could not even find the proper instruction manual for this engine.

Since receiving this engine I have done and initial inspection, complete disassembly, clean up, reassembly, and now the first run. I...Continue Reading
Posted by dmrcflyr2 | Jan 16, 2017 @ 05:26 AM | 6,069 Views
Are you looking to get into the rapidly declining glow engine market? What the heck sort of question is that? Why would I want to get into a dying aspect of the hobby? Well the last two are valid questions. I am a glow engine fanatic and always will be. Yes I have tried to electric stuff but it really just didn't do anything for me. The gas/glow engine sector of this hobby is the foundation of RC powered flight. Unfortunately most new entrants to the hobby are quickly sucked up into the electric scene and seldom get the appreciation for the glow powered arena, and this is truly sad. Fortunately I have seen that change at the flying field I fly at. It was a 85% electric site several years ago and now they have an entire pit section for glow power only! That is really huge in my eyes.

Believe it or not glow engines maybe on the decline but there are millions of glow engines NIB, lightly used, and heavily used available on the market. These are also available for a fraction of the cost of buying them retail. Now do not get me wrong I am NOT bashing buying retail at all. Without retail sales the market would be doomed much faster. On the other hand if you are curious about a glow engine, very high quality and inexpensive engines are available for you to 'stick your toes in the water' with. Nearly 99% of the engines I buy are from RCGroups, eBay, or the 'other' big US RC forum. I have bought my share of retail NIB(New In Box) engines from 1988 - 2001 so don't...Continue Reading
Posted by dmrcflyr2 | Jan 13, 2017 @ 03:43 PM | 6,116 Views
So I took a chance on this engine from a RCG member who has a bit of a reputation. I paid a bit more than I should have in hindsight, but that is water under the bridge now. It is a decent low time engine that had been exposed to the FL elements resulting in a less than spectacular external appearance. I did my usual, inspection, disassembly, and refurbishment. All it needed was some new bearings. This is also the only 4 stroke engine that I have bought and run that is still in production. Well, let me think.... some of the Enya's I have bought might still be in production so scratch that. Either way it is the latest version 4 stroke from OS that I have had in many years. I did not get a box with it and unsure of the actual country of origin. That really only matters in terms of longevity. The quality of this engine looks to be quite good. I have made several videos covering this engine, but the one posted here is of the first run after rebuild. Check out my YouTube channel for the other videos.

OS FS-95V The First Run After Rebuild (8 min 6 sec)

Posted by dmrcflyr2 | Dec 30, 2016 @ 05:03 PM | 6,373 Views
I LOVE engines from the 1980's. That is the decade I started in the hobby and a good time of my life. Not to mention that some of the highest quality engines, in my opinion, were being manufactured during that time. I am fortunate enough to have acquired a 120 four stroke from each of the major players in the glow engine market of that time, Enya, Saito, and OS. Coincidentally each of these engines was introduced in 1983 five years before I entered the hobby. The Enya R120-4c, the Saito FA-120S DP, and the OS FS-120.

Each of these jewels was purchased for $100 ea avg. That in and of itself is simply amazing. Each needed some TLC which I was more than happy to provide. Bearings, cleaning, gaskets, a few other miscellaneous parts here and there. Each runs great and has a happy 'forever' home!

Well I have updated this post now to include a YS F-120 that a wonderful member here graciously provide to me. Thank you Jim!!!...Continue Reading
Posted by dmrcflyr2 | Dec 22, 2016 @ 05:55 PM | 6,369 Views
I have been looking for one of these for some time, excess of 1 year or more. I have seen a few, missed a few. Finally while scouring the back pages of the engines classifieds I find this engine. I inquire if it is still available and get a positive response. Seventy five dollars later a deal is made. Payment sent, and the wait begins. Now granted I will jump on many a four stroke engine under the $100 mark, but scoring this specimen even though it was engine only had me smiling. I mean I have seen a few NIB versions for well over $200.

A bit of history first. This engine was introduced to the market in 1983. This particular year was an interesting one for OS and four stroke engine lovers. It featured 3 different designs of four stroke engines! This one, which at the time, was the first and ONLY slip rocker 4 stroke engine from OS. The other two were the FS-90 which featured the rear rocker design like the Enya engines. Lastly the FS-61 was also released and this most looks like the standard OS 4 stroke design.

The day it arrived I tore into the box anxious to see my latest score. Granted it is a 30+ year old engine and it showed a bit of time passage but all in all it was in very good condition. The bearings felt smooth and the compression was monstrous! It was in good enough condition to run like it came, and that is exactly what I did! It ran pretty well but I felt it still needed some internal inspection and possibly new bearings. I have several videos attached here. The first is my initial Quick Look at the engine and the second is the Box To The Bench run of the engine. Several more videos will be posted as I disassemble the engine.

OS FS-120 Pre-Surpass A Quick Look (12 min 43 sec)

OS FS-120 Pre-Surpass Volume 12 Box To The Bench (7 min 33 sec)

Posted by dmrcflyr2 | Dec 05, 2016 @ 05:37 AM | 6,592 Views
Those of you who read my blog on a regular basis will know that I recently purchased an ASP FT-160 twin cylinder 4 stroke engine. Well as this addiction goes, and it is an addiction, I stumbled across another really sweet deal on a twin cylinder engine. Now I have had 3 twins prior to the ASP and they were Saito FA-80T and two Saito FA-90T engines. I flew them both in airplanes, a scratch built Cloud Dancer 60 and a Value Hobby Easy Stik 60. Both engines flew these airplanes very well and I had a ton of fun with them. And then for some still unknown reason, I sold them. Initially I was ok with this decision but as time passed I began to really regret doing this.

That brings me to the latest twin I purchased, a Saito FA-100T. Well at least now I have had three different Saito twins displacements. This one is a real beauty too! I really hope I don't get to a point where I part with either this or the ASP because they are both fantastic! Check out the last video that I made of this engine. It is now oiled up and back in the box. I am working on building an airplane and I do not need further distractions.... LOL

Saito FA-100T The Second Run (9 min 10 sec)

Posted by dmrcflyr2 | Nov 25, 2016 @ 04:56 AM | 6,774 Views
So I was coerced into buying this engine. No, not really, but after seeing and corresponding with a great fellow and YouTube subscriber in Slovenia I decided to get one. Sure, I had to sell a few engines to offset the cost, but hey they are just things. So after selling about 5-6 engines I felt much better about this purchase.

The amazing thing was I ordered it on a Friday from Hobby King Hong Kong warehouse and it was at my door step on Tuesday the following week!!! I have ordered things from HK before and didn't get them for nearly a month so I was floored when this arrived on Tuesday. Anyway, it is absolutely beautiful! I have run it three times now but only two of those videos are linked here.

I am still tweaking the carb a bit but it is better than in the first video. Tweaking and running it is ALL of the fun as well.

First run
ASP FT160 AR First Run (15 min 19 sec)

Second run same tank of fuel
ASP FT160 AR Completion of the First Tank (10 min 10 sec)
...Continue Reading
Posted by dmrcflyr2 | Nov 20, 2016 @ 08:28 AM | 6,713 Views
I came upon a very nice Enya R120-4C engine this week. I was quite surpised when a fellow RCG member, Chris, contacted me last weekend asking if I was interested in an engine. He told me what he had, sent me some pictures, then the negotiations began. One week later it is in my possession and I could not be happier with it.

The Enya R120-4C is the more powerful of the 2 Enya 120 sized 4 stroke engines. it was introduced to the market in 1984 is still has considerable parts support and following. I have wanted an Enya 120 for some time, but the R120 was what I really wanted. A big thank you to Chris for contacting me on this!

It arrived and I did an initial external inspection and determined that it was in good enough shape for a run.

Volume 10 Box To The Bench Enya R120 4C (13 min 13 sec)

Posted by dmrcflyr2 | Nov 11, 2016 @ 03:14 PM | 7,075 Views
I am about to build an airplane that was featured in the December 1987 issue of RCModeler magazine. This airplane, the Super Sportster 90/120, went on to become a kit distributed by Great Planes. Now back in 1988, when I entered the hobby, I built several SS 40 kits. I actually built nearly all of the Great Planes kits offered during that time period. I have never had the 90/120 and I am quite excited to build the version before it was kitted by GP.

I found the plans on and a great friend of mine Rob Reynolds has a laser cutter and offers short kits for many airplanes to include this one. I have received this short kit from Rob and I am now in the engine selection process. I still have to get all remaining wood for the build, but now is a good time to decide on an engine.

Super Sportster 90/120 Part 1 Engine Selection (6 min 2 sec)

Posted by dmrcflyr2 | Oct 22, 2016 @ 11:51 AM | 7,126 Views
Man I have been getting really lucky of late. Early Monday morning I just arrived at work and while drinking my coffee I took a quick look at eBay. I stumbled upon something that nearly had me spitting coffee all over the place! A Saito FA-40S engine. This was not on auction, it was listed as a Buy It Now and only had 3 hours left. The list price was $75 and I offered something a bit less hoping I had time to get a response before someone came along and paid full price.

Well lucky me my offer was accepted and payment made. Now the ad stated and I quote," This is a Saito .40 SPECIAL engine that runs fine. It is an older engine and a very sought after runner.". To me this statement implies that the engine turns over and has compression.

Well to my surprise the engine arrived on Thursday and it looked just as it did in the ad. Wait a second.... it is locked up! The crankshaft does not turn over at all! Oh crap, I think. What have I done now? I did not ask ANY questions about this engine due to the rare nature of it and the time frame left on the listing, so I took a chance. Anyone that buys from eBay knows that there is considerable risk involved with many purchases. I chose to take this risk and it looks like it might have bitten me, or did it? Granted if the piston ring is broken I am screwed, but if it is just locked up due to sitting for a long while, it could just need heat, oil and new bearings.

Well I sent an email to the seller...Continue Reading