Mailing List flyrotary@lancaironline.net Message #68003
From: Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] PSRU Front Seal
Date: Sat, 11 Apr 2026 08:46:07 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Thanks, but that's got to be for the engine.

I'm looking for the seal in the rear of the PSRU. 1"IDx1.5"ODx0.312"wide/deep/thick.
Found and ordered a couple of old new stock National 350909 on eBay.
Now Tracy says he can't think of a reason why 0.25" thick seals won't work.
Time to take the PSRU apart ...
Wonder when I'll ever get the RV-3B flying ...
Over the last several months, while waiting for the new AWC and OpLims (which I  finally got March 26th) so I can sign off the annual condition inspection, I've had fun trying to lighten up the engine installation. Lost more than 12 pounds so far but used 5 pounds of that to install 12V 9Ah backup battery. Tested that alternator and engine runs fine with main battery disconnected. Engine runs strong. After installing new seal I just need to work up the courage to go flying again.

Finn

On 4/11/2026 8:17 AM, DOUGLAS LOMHEIM dlomheim@aol.com wrote:
Finn:  this is what Dennis Haverlah used in 2022 on the front shaft….

Doug


Sent from my iPhone

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