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OS FS-61 A Look Inside

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David's Stuff

David's Stuff

Күн бұрын

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?
WRONG!!!
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!
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Пікірлер: 10
@cratecruncher6687
@cratecruncher6687 4 жыл бұрын
I just bought one of these engines NIB too. It just amazes me that you can still find NOS engines produced in 1980's! In 1985 I was poor college student that could barely afford a K&B 40. The O.S. 40SF was over $100 then and that $250 price sticker is not far off from what I remember. The 4 stroke was exotic like a V12 Ferrari and everyone considered O.S. "The Best". I never would have imagined that nearly 40 years later I'd be buying the OS 4 stroke 61 for the same price as a K&B 2 stroke.
@BWH1990
@BWH1990 8 жыл бұрын
I just purchased an OS FS-60 Open rocker engine. I look forward to getting it this week. Hope I am as lucky as you.
@scdevon
@scdevon 7 жыл бұрын
Beautifully made Japanese engine. You could become addicted to collecting and tinkering with these engines.
@harveynewman4333
@harveynewman4333 8 жыл бұрын
i just bought, tonight,a NIB,OS FS 61,with all paperts,tools,box, for a really good price. i now have 4 of them. may sell 1 of them.
@rodderbeck1591
@rodderbeck1591 6 жыл бұрын
i have an OS 61 that has very low compression. what all could be the problem? the valves are set and closing fine. it draws fuel good. i appreciate your time.
@dmrcflyr2
@dmrcflyr2 6 жыл бұрын
kzfaq.info/get/bejne/l7dxqa9_qd3Kqps.html
@italkit2506
@italkit2506 6 жыл бұрын
i have one of these the cam followers are stuck could i heat it in the oven without the carb on?
@dmrcflyr2
@dmrcflyr2 6 жыл бұрын
Better to use oil and a heat gun.
@italkit2506
@italkit2506 6 жыл бұрын
David McIntire thank you
@car6on14
@car6on14 6 жыл бұрын
Thanks for the tear down vid, nice engine and great find. I just got a used one for a project, mine has a small muffler and not the straight pipe: Nice write up on this here: sceptreflight.net/Model%20Engine%20Tests/OS%20FS-61.html
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