[Public-list] Atomic 4 compression

[Bob Crinion]

My Atomic 4 behaved exactly like your engine did when I bought the boat.

In my situation it turned out to be old gas in the fuel tank.
I drained the tank and added new fuel.
I also changed the main carb gasket that separates the top from the bottom
half of the carb and a new fuel filter.

It worked fine after that.

My engine revs at 1900 rpm @ 6.2 kts in flat water.
I have a 11" X 7" pitch 2 bladed prop.
I use Castrol 5 W 40 synthetic oil and burn premium unleaded gasoline.
It seems to burn slightly less than a gallon an hour in moderate conditions.

-bob
A30 #560



-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org] On Behalf Of Brian Palmer
Sent: July 5, 2006 10:59 AM
To: Alberg 30 Public List -- open to all
Subject: Re: [Public-list] Atomic 4 compression

Speaking of the Atomic 4's, can I get an idea from my fellow Albergers what
RPMs you run your A4s at to achieve cruising speed (and what speed you
generally power along at)?

I'm experiencing problems with my A4 where it seems to be lacking power.  It
runs just fine out of gear, but in gear, I cant get it above about 1200 RPMs
on a good day.  On a bad day, it stalls out, and will only continue to run
when I choke the engine quite a bit.

When idling out of gear, it runs smooth, and will rev up smoothly, but under
load it doesn't do so well.

I had someone suggest that I might have a leak in the seal around my carb,
which would explain the need to choke it to pull in extra fuel to mix with
the extra air leaking in.  Does anyone have a suggestion I can try?

-Brian
L'Esprit 288
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