115 mercury carb problems

zalabala

Cadet
Joined
Jun 21, 2011
Messages
10
on my inline 6 my bottom carb has no draw what could this be? I have good compression
and good reeds.
 

Dave1027

Lieutenant Junior Grade
Joined
May 25, 2010
Messages
1,026
Since nobody else has offered any help, I'll take a stab at it.
I'm thinking leaking lower crankshaft seal?
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
25,810
With leaking crankshaft seals, he would get water in the lower two cylinders, and they usually do not fire. Water will manifest as droplets on spark plugs.

Maybe a leaky crankcase cover? Loose endcap bolts?
 

zalabala

Cadet
Joined
Jun 21, 2011
Messages
10
With leaking crankshaft seals, he would get water in the lower two cylinders, and they usually do not fire. Water will manifest as droplets on spark plugs.

Maybe a leaky crankcase cover? Loose endcap bolts?
Problem found exhaust was full of dirt Dobers nest all the way up to piston ports also sand from dirt Dobers ate out main seal I'll try to post some pics.
 

BrianVT

Petty Officer 2nd Class
Joined
Jun 17, 2021
Messages
110
Problem found exhaust was full of dirt Dobers nest all the way up to piston ports also sand from dirt Dobers ate out main seal I'll try to post some pics.
Sons o' bitches!
I got a smoking deal on a Stihl chainsaw that a guy gave up on.
You guessed it. Dobers had plugged the exhaust tube. Reamed that out and I had a like-new saw.
You won't find this stuff in your repair manuals.
:)
 
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