Lance,
Never thought about it, but it couldn't hurt. What got me started thinking about it in the first place was the condition of a glow plug after being in the engine over the winter. It looked like it had stalagmites on it! As I recall, it was a piped .60 Rossi on a Curare. We're talking a good 20 years ago, here. About the same time, I read an article about nitric acid being a by-product of the combustion process of engines burning fuel with nitro. BTW, all the other normal storage things had been done (run dry, after-run oil, etc). My memory was a lot better back then so I stored that info in my head and put it to use when the season came to an end. I did everything the same and it was actually the same engine and pipe, except this time, I rotated the engine up against compression to close off the exhaust port, thereby shielding the innards of the engine from all those nasty fumes that were reportedly lurking around in our tuned pipes. The following spring, the glow plug and everything else was in good shape.
I've since read that the nitric acid thing was hogwash. Don't know if it is or not, but I've been storing 2-strokes with the piston closing off the exhaust port since that experience. Seems to help a bunch. Kinda one of those take it or leave it things that I'm unable to discuss with any technical expertise.
Verne
----- Original Message -----
From: Lance Van Nostrand
To: discussion at nsrca.org
Sent: Sunday, April 18, 2004 9:26 PM
Subject: Re: Interesting Motor Discovery-OS1.60
Verne,
that's an interesting suggestion. Would you extend the thought to also make sure the carb port was a bit open, so the fumes could escape harmlessly out the carb?
--Lance
----- Original Message -----
From: Verne Koester
To: discussion at nsrca.org
Sent: Saturday, April 17, 2004 10:21 PM
Subject: Re: Interesting Motor Discovery-OS1.60
Bob,
This may sound a little crazy, but I learned in the old piped-60 days to store my 2-cycles with the piston as high up in the cylinder as possible. The logic was to close off the exhaust port from all the nitric acid fumes in the exhaust system. The fumes seemed to be worse in a piped system for whatever reason. Sounds crazy, but it worked for me.
Verne
----- Original Message -----
From: Bob Pastorello
To: NSRCA
Sent: Saturday, April 17, 2004 3:25 PM
Subject: Interesting Motor Discovery-OS1.60
Finally got around to getting the Wagstaff Extra airworthy, after not being run for the winter. Felt rough, so tore it down. Bearing was not really bad, although a little rust was present (wasn't a SS bearing). Upon investigation, noting the serious lack of compression, I proceeded to replace the bearing.
While the piston was out, of course I cleaned it....lo and behold...RING rusted SOLID in the groove. After careful working with my Amsoil spray, it freed, and I cleaned the groove.
What was interesting was oil on top of the cylinder, and on the cylinder wall (not a lot, but a film was there)...and the side of the piston around the ring groove was bone dry.
Fixed it all up, ran like a top, very smooth - so shoudl be good to go. I have never seen a ring stuck like this before, and just thought I'd share the tale in case anyone runs into inexplicable roughness and low compression....
Bob Pastorello
rcaerobob at cox.net
www.rcaerobats.net
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