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Old 07-24-2007, 06:22 PM   #1
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Default Cleaning Nitro motors?????

I just picked up a motor from someone for nothing, (O.S. Max). It has after run oil in it but the outside of motor has red clay dirt all over it and I'm curious to find out the best way to clean the entire motor. Can I soak the motor in something to help loosen the dirt off it?
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Old 07-24-2007, 06:34 PM   #2
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I put those rubber caps on the carb intake and exhaust port. Then you can spray it down with engine degreaser, if it's really bad, and then blast/scrub it off with hot water. If not too bad, hot soapy water and a good brushing. Make sure to dry it thoroughly afterwards and you should be just fine. Maybe relube the bearing.
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Old 07-24-2007, 06:40 PM   #3
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thanks
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Old 07-24-2007, 07:56 PM   #4
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I have good luck with denatured alcohol. I use a stiff brissled brush and dip it in the alcohol and go to cleaning, then I spray it down with simple green and clean it again. Seems to do good for me.
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Old 07-24-2007, 08:27 PM   #5
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Quote:
Originally Posted by tubehead View Post
I have good luck with denatured alcohol. I use a stiff brissled brush and dip it in the alcohol and go to cleaning, then I spray it down with simple green and clean it again. Seems to do good for me.
denatured alcohol cleans fine... but point them away from bearings...
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Old 07-24-2007, 08:35 PM   #6
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Thanks for all the help
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Old 07-27-2007, 08:06 PM   #7
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also what works good is nitro blast they probibly have it at a hobbie store i use it a lot the only it takes everything off just wipe the spot after you sprayed it
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Old 07-28-2007, 05:23 AM   #8
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i use tis stuff on my bike called 'muc-off' and you spray it on, leave it 10mins and wash off, and it takes the dirt with it. its bright pink, and looks a bit weird. i don't know if you have it in the us but it shoudl work well.
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Old 07-28-2007, 07:08 PM   #9
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I usually pull the engine leaving the manifold and pipe on, pull off the clutch and flywheel, air filter assembly and cap the carburetor. Then shoot it with WD40 and let it soften the clay, use an old toothbrush to break down the heaviest build up. Then rinse it off with WD40 until itís shiny as new. The WD40 will not damage the plastic or composite components nor will it damage the bearings. Wipe down the engine using paper towels or blue shop towels. Reinstall the carburetor filter assembly. If you have excess build up of dirt junk around the exhaust port or carburetor you have a leak and will need new exhaust manifold gasket or carburetor O-rings or fuel banjo fitting needs replacement.
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Old 07-29-2007, 03:52 PM   #10
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Well I've got it clean and put all back together and now I can't get it to start, it has an OS Max CVR motor. It turns over but that seems to be about it. I'm not sure if I have the carb set right or not. Does anyone know what the basic start point is for this motor?
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