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05-19-2009, 01:09 AM | #1 |
RCC Apprentice
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cleaning up an old engine
Hi guys,
its been a while since i've got a chance to do anything more than fly simulators and mess up a fuse build, but for May long i headed back home and cleaned out a closet for my Mum... i managed to find a box or two of goodies that i almost forgot i had, mainly a bunch of parts (tools, wheels, and props) and my trusty OS max .60 that i had nicely bagged up. it has some oil in it and turns smoothly if a little stiff. i would not mind getting the engine back into service. any advice on cleaning it up? it seems to have a nice amount of compression. another cub may be in my future, or at least a decent sized trainer
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Thanks, -Chris |
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05-19-2009, 08:32 AM | #2 |
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Re: cleaning up an old engine
I just rebuilt my OS 40FSR stored for 20+ years and a 40SF and GMS 47 that came with a plane I bought. Those all needed bearings, mine due to the environment it was stored in and the last 2 due to the fact they had low time, but no after run oil had been used.
For that I use a 50/50 mix of air tool oil and ATF and it works great. This would probably be a good idea to run in the bearings and free up the ring. Other than that, soaking in alcohol should remove any old gunk accumulated on the case. However, try not to rotate the crank until oiling it again to prevent damage to the bearings. Another concern is if it had any rubber parts, such as front crank seal or carb O-Ring. If the front bearing used rubber it will bond to the crank in long storage and tear apart the first time it turns, creating a leak point for air and oil. Take a good look at the carb O-Ring as age causes it to shrink and lose flexibility, (just like the rest of us!). Another leak point. |
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05-19-2009, 08:46 AM | #3 |
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Re: cleaning up an old engine
OS Max .60 designation means that it is an older, no longer in production engine.
As they age, parts supply becomes more scarce. As they age, they are no longer on par with current engines in terms of power, weight, operating characteristics and so forth. This is only a suggestion: if you must be nostalgic, clean it up, put it into a clear plastic box set it on your mantle and admire it. For your working engine, get something current and be done with it. It' time to move along. |
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05-19-2009, 10:13 AM | #4 |
RCC Apprentice
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Re: cleaning up an old engine
not really a matter of nostalia, its a matter of expense. sure its 10+ years old but new motors arn't cheap, and i barly had a liter of fuel through the motor. (four flights with the cub and my instuctor moved away. he bought the plane off me i kept the motor)
i did soak in some 3 in one oil (lube not penitrant) before i rotated anything.... wonder if there are any gasket/bearing/ring kits left for the motor.... ty for the replies.
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Thanks, -Chris Last edited by Chris W; 05-19-2009 at 10:17 AM. |
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05-19-2009, 10:47 AM | #5 |
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Re: cleaning up an old engine
Get yourself a small slow cooker , one that you will designate for this purpose only . (never to be used to cook food in ) Disassemble the engine . Take off the carb , back plate , muffler and pull the glow plug out . Place all the parts in the crock pot and fill it with straight antifreeze . Place the cooker on low and let it bubble away for a day or so . Turn the engine over after a few hours , and scrub the engine with a toothbrush to remove any gunk on the outside . When you are satisfied that it is clean , rinse all the parts in warm soapy water , followed by a rinse in just water . Blow dry the parts , re-assemble and run a tank of fuel through the engine immediately . You'll be surprised at how well this works . I have cleaned up several old engines that way , and it works well .
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05-19-2009, 11:51 AM | #7 |
RCC Apprentice
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Re: cleaning up an old engine
thanks Hellyeh and Ed.
that 4 stroke looks nice. will have to go to liquidation world and pick up a cheepo cooker. side question: i saw Ed's coffee can trick to keep oil from going all over in another thread, being that i live in a 4 story apartment is there a way to keep the noise down enough to keep the neighbors happy (make an extreme muffler), or should i take the workbench out to a open field? i don't yet have a membership to any local field let alone a MAAC membership (just getting back in to the hobby in a long way, i know i have to get them before i can fly), so i don't know if i'd be allowed to go to an airfield to run a tank or two through it. mind you i didn't ask yet either. the field i visited at their last 'open house' seemed like a decient group of people, but i don't want to impose & possibly break field regs.
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05-19-2009, 01:17 PM | #8 |
RCC Noob
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Re: cleaning up an old engine
sounds like DO335 is a RTF flyer. I have lots of old engines including a Peco 60 and an old OS 40, tiny little thing compared to the new stuff, and they still fly an airplane fine. Update the muffler if you want to if noise is an issue.
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05-19-2009, 02:05 PM | #9 |
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Re: cleaning up an old engine
I've been able to find a new ring for the 40FSR and bearings are still available.
Gaskets may be a different story, unless someone has some NOS laying around. |
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05-19-2009, 03:30 PM | #10 |
RCC Expert Contributor
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Re: cleaning up an old engine
Ya, old engines are fine. I have an OS91FX that is probably 13 years old and man, it runs like a top. My father-in-law has an enya 60 thats 25 years old and still starts like the day it was bought (so I'm told). No need to set either one on the mantle, in fact, I don't even understand where DO335 is coming from. Maybe he's not an engine guy. Must not be if he thinks that. Hellyeh made me a believer on the older stuff, you wouldn't believe the junk he gets running like new.
Dale
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Hey Buddy, thats a Kadet not an Extra!!! |
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