[NSRCA-discussion] Hatori Short Pipe O-Rings

[vicenterc at comcast.net]

Jim,

I believe Todd could be correct.  I was having problems with my engine #1.  I sent it for service and they replaced the front bearing.  Besides the oil mess the engine was running lean sometimes.  I installed the engine#2 and never had problems.  I never had chance to run engine #1 after came back from service so I am not 100% sure that front bearing was causing the oil mess.  I will know next season. 

Regards, 

--
Vicente "Vince" Bortone

-------------- Original message -------------- 
From: "Todd Schmidt" <tschmidt at classicnet.net> 

Jim,
I had the same problem, clean on a long pipe, and gobbs of oil everywhere when I started using the short pipe. 

I changed engines and the new one is very clean and dry. Something is going on with my other engine to cause so much oil. Same as you, all bolts are tight. Vincente Bortone was having the same mess of a problem with a new engine and short pipe. I believe he told me it was the front bearing causing the mess. 

Todd

----- Original Message ----- 
From: Woodward, Jim 
To: NSRCA Mailing List 
Sent: Tuesday, December 11, 2007 12:49 PM
Subject: [NSRCA-discussion] Hatori Short Pipe O-Rings


Hi Guys,
What is the final verdict on these O-rings?  Will a warm run “melt” the O-ring?  Does the viton replacement fit tight enough over the header?  Recently my plane is getting really messy, where as before there wasn’t a drop of burnt fuel ahead of the exhaust stinger.  I replaced the o-ring but still had the mess.  I pull the motor last night and checked out everything and the motor looks great, bolts were tight, with no indication of any leakage from the motor or header to motor/flange attachment.  
I am using the Nishioka spring clamp mount.  All things considered and experienced, I think I prefer the stock Hatori mount that comes with the pipe.  The Nishioka seems to allow for more fore and aft pipe slippage during running due to the thin vertical white plastic supports (checked while running the plane upside down to try and determine spray pattern and such -  in which I didn’t find one, which leads me to believe that it starts to happen maybe later in the flight or heat cycle, versus the small amount of running I did as a cursory check.
Thanks,
Jim

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From: "Todd Schmidt" <tschmidt at classicnet.net>
Subject: Re: [NSRCA-discussion] Hatori Short Pipe O-Rings
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