T&T: Dinghy engine

[Paul Brannon]

You probably have debris in the carb (possibly from ethanol enriched fuel) 
that is blocking at least the idle circuit.  Try starting it and then 
opening the throttle past the mid point before it dies and see if it will 
run hard but not idle (You may need to be in gear to do this so be careful). 
This will tell you that it is a problem in the idle fuel passages and not in 
the main jet.  Either way will probably necessitate a carb overhaul to clear 
whatever debris is there.  Generally spray "Carb and Choke" cleaners are 
ineffective for this unless you can remove an idle mixture screw and spray 
directly through the passages there.  Sometimes you get lucky and the debris 
is in that area and is not something like rust.  If you can find it, use a 
fuel without ethanol.  Some marinas carry it and it is worth it if you can 
find it.

Paul
----- Original Message ----- 
From: <StWillett at aol.com>
To: <trawlers-and-trawlering at lists.samurai.com>
Sent: Monday, September 21, 2009 2:08 PM
Subject: T&T: Dinghy engine


> I'm having a problem with the 4 stroke 6hp ,Mercury on my dinghy.  It
> starts fine when the choke is pulled out. As I push the choke control in 
> it  runs
> ok till the control is about 3/4 of the way in then it dies. I put in a 
> new
> Spark plug, and am using new 92 octane gas. Any ideas I can try before
> bringing  it to the dealer?  I believe it is a 2003 model engine
> Thanks,
> Steve Willett
> Monk 36, Gumbo
> Thibodaux, Louisiana
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05:51:00