Mailing List flyrotary@lancaironline.net Message #53528
From: Chris Barber <cbarber@texasattorney.net>
Subject: Re: [FlyRotary] Re: Hard hot start problem possibly found.
Date: Fri, 7 Jan 2011 01:52:28 +0000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
My seals are from Tracy. I am curious if I have to replace one or two from Mazdatrix which ones should be ordered. I know, not the ceramic (I wish), but I think that Mazdatrix list two types. I don't know of a local place in Houston, even though Houston may get bumped up to third largest US city with the new census. Sent from my iPhone 4

On Jan 6, 2011, at 3:21 PM, "cbeazley" <cbeazley@innovista.net> wrote:


Sounds like stuck seals.  Probably carbon gum-up or minor rust.
What vendors apex seals and springs are these?
Home Depot Zep Industrial purple is a great degreaser.  Acetone is another common remedy.  You may be able to spray or brush it into the apex slots.
If you have access through the exhaust ports, some forced mechanical movement in every direction by tape covered needle nosed pliers may help restore movement and possibly remove surface rust.
Some folks out there have poured acetone through the spark plug holes to get an old (sometimes seized) engine running again.  I've heard of more than a few people complaining about coolant/oil seals later...
Do you recall the apex clearance assuming you rebuilt the engine?  You might be able to check apex clearance in place with feeler gauges while you are at it.

Cheers
Cary

I meant to say ATF instead of acetone through the plugs holes.
Cary

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