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Archive for January, 2016
Posted by dmrcflyr2 | Jan 30, 2016 @ 10:47 AM | 4,928 Views
The OS 25F ABC engine was released to the market in 1982 and a review can be read here.
http://sceptreflight.net/Model%20Eng...8F%20Heli.html

I bought this engine from Ebay about 1 week ago. It was advertised as "bench run only for break-in purposes". Nothing more than that. When it arrived it would not turn over at all. The exterior was excellent and did look to be a very low time engine.

As standard I took it apart to determine the condition of the inside and free it up. The top of the piston had no carbon build up at all on it confirming the low run time. There was little evidence of running inside, no excessive residue or rust, It looked quite nice. The one or two runs it had were just enough to, over time, freeze the parts in place.

Once freed up the engine turned over smoothly and the bearings felt nice. I lubed it up and decided to give it a run.

As typical with OS engines of this era, it is a fantastic running engine. Hand starts are easy and was tuned transition from idle to WOT is quite nice. Take a look.

OS 25F ABC First run (7 min 23 sec)

Posted by dmrcflyr2 | Jan 25, 2016 @ 07:52 AM | 4,719 Views
Well this engine turned out just like I thought it would, another nice running OS engine from the 80's. Not much more to say about it other than that. The video pretty much speaks for itself.

OS FS-40 Surpass first run after rebuild (6 min 12 sec)

Posted by dmrcflyr2 | Jan 22, 2016 @ 07:48 PM | 5,294 Views
The bearings arrived today and I was all excited about getting this engine back together. I will be running the engine again tomorrow. I think this will be a keeper.

OS FS-40 Surpass reassembly (14 min 53 sec)

Posted by dmrcflyr2 | Jan 16, 2016 @ 02:39 PM | 4,437 Views
I shot a video of this engine running today. While running I found that the bearings need to be replaced. At this time it is completely torn down and waiting a new set from RCBearing.

OS FS 40 Surpass (5 min 31 sec)

Posted by dmrcflyr2 | Jan 15, 2016 @ 07:30 PM | 4,726 Views
So I was browsing Ebay last week and saw an auction for this little engine. When I saw it the auction time was down to the last hour. There was only one bid so on a whim I bid $1 higher figuring I would quickly be outbid. Well that isn't how it happened. As the time wound down, no one was bidding on it... uh oh. I just bought an engine I was really only curious about.

Anyway it is here and it is a fine example of 1986 OS engineering. This was the early days of the Surpass series of engines. I have taken pictures of it next to my 48 Surpass, which followed in 1987. You can tell many differences in the exteriors of these engines.

I have not run this engine yet, but I did take a look inside. I plan on running it tomorrow. BTW, it is for sale too.

OS FS-40 Surpass (8 min 46 sec)
...Continue Reading
Posted by dmrcflyr2 | Jan 04, 2016 @ 07:37 PM | 5,035 Views
So in my browsing of EBAY, I stumbled across a really decent looking OS 40FP on a Buy Now or Best Offer type of sale. The buy it now price was $65, NOT! So I made an offer well below that and it was accepted! I took a chance hoping it was a low time engine based solely on the pictures. It would not turn over was the only other description.

Well it arrived today looking just as good as the pictures. Sure enough it was locked up tight! I removed the muffler and quickly discovered why, rust! Yes sir! This is an early cast iron piston OS 40 FP!! It had surface rust on the piston keeping it from turning over, that was it. I took it apart and soaked all of the iron/steel parts in CLR and viola! Brand new engine!

the way it looked inside the back plate I really do not think it was EVER run. Not one sign of dried fuel, oil residue at all. Check out the pictures. I even have a picture of the piston attached to a magnet. These are quite rare to find especially basically new like this one. It could be for sale.... make some offers....Continue Reading
Posted by dmrcflyr2 | Jan 03, 2016 @ 07:03 AM | 4,911 Views
I recently acquired a very nice vintage Saito FA-45 MK ? ABC engine from a great member here on RCG. I said MK? because this is the early two piece head version of the FA-45. The box does not have a stamp in the white circle on the box used to indicate the version, but the instructions state that they are for a FA-45 MKII ABC. This is where the history and timeline of Saito engines becomes quite blurred.

In either case this is an excellent example of Saito history and a fine specimen. I have s few pictures of it sitting next to my other FA-45 MKII. However there are several the big differences between these engines. The boxes look to be about the same time frame but the engines could not be more different.

1. Head design.

2. Intake manifold due to head design.

3. Rocker covers.

These are the major differences, but there is another that is a bit more critical, parts availability. The single piece head shares many of the same parts as the modern Saito engines. The two piece head has very different rockers arms making them nearly impossible to find if necessary.
Posted by dmrcflyr2 | Jan 02, 2016 @ 07:15 PM | 5,091 Views
Yes during the Christmas break I scored yet another Enya 60-4C engine. This one was a bit worse than the last one. This one did not have a carb or exhaust header and looked 10 times worse!

Visually this looked like a mistake right when I took it out of the box. But I set to work inspecting it, and then doing some preliminary cleaning. Again all the fasteners had crud in them so that all had to be cleaned out before I could begin dis-assembly. This thing looked like it had spend time at the bottom of a lake and unfortunately I was not able to get the exterior nice and shiny again.

What a surprise once I opened it up. It looked like I scored another low time engine. I did shoot videos of the dis-assembly but took very few, i.e. none, pictures during the process. I got so wrapped up in the process that I neglected to take any pictures except the before and after ones shown here.

Rest assured the piston looked new and although the ring was compressed and stuck in the ring groove, once freed up sealed quite well. Even the valves showed minimal run time, with no real carbon build up on the exhaust valve at all. My estimate that this engine had less than 1 gallon through it. I will be running it tomorrow and shooting video of that.

The parts I had to replaced/include in this rebuild are, a new carb, new Enya #3 glow plug, and exhaust header with nut. All other parts were in good enough shape to re-use.

It may not look the nicest on the outside in person...Continue Reading