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1. 04:59 AM - Re: 503 troubles ..... (Stuart Harner)
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| Subject: | 503 troubles ..... |
What happens if you apply the enricher as it starts to bog down?
If making the mixture more rich helps then it is running lean when
bogging down and you likely have an air leak. The only two places I can
think for air leak is the carb boot or the crank seals. Carb boots are
notorious for this and easy to replace. I hope your crank seals are
fine.
If making the mixture more rich contributes to the problem it is already
running too rich. Are you seeing any additional smoke at 4000 RPM? If
too rich, perhaps the little rubber tip on the enricher is bad and
letting too much fuel in.
Let us know what you find.
From: owner-kolb-list-server@matronics.com
[mailto:owner-kolb-list-server@matronics.com] On Behalf Of artdog1512
Sent: Monday, June 14, 2021 10:28 PM
Subject: Kolb-List: 503 troubles .....
Did the engine previously run normally with that same prop at the same
pitch? And
now will not? Or is this a new engine prop combination?
--------
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
same prop.. no change to pitch. ............ i'm suspecting the carbs.
the engine runs smooth up to 4000 rpm, beyond 4000 it bogs down. it is
rather old, i wonder if the seals in the carbs are leaking and sucking
air?... i have ordered 2 seal kits for the carbs. stay tuned!
2 broke Tim
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