75 merc outboard problem...HELP!!!!

B

boatmercsearay

Recruit
Joined
Jun 25, 2008
Messages
1
I have a 1975 Mercury 65hp 3 cylinder,twin carb outboard.It has good compression,good spark on all cylinders(new plugs as well).I've got new fuel in it.The problem is it will not fire on #2(middle) cylinder.I tried running a short time with no water in cooling system in case water was getting in combustion chamber.Also tried squirting a small amount of fuel in cylinder through spark plug hole in case it has a broken reed and not getting fuel.(the plug seems dry when pulled).I thought with good compression,good spark and fuel it should fire)
Is it possible that #2 cylinder will not fire with the above tests because of bad reed...or?
Scott
 
Barnacle_Bill

Barnacle_Bill

Admiral
Joined
Feb 8, 2004
Messages
6,469
Re: 75 merc outboard problem...HELP!!!!

Running a motor without water is a good way to ruin a motor. Even a short time can destroy the impeller as water is the only lube it gets. With the lecture out of the way it sounds like you need to rebuild your carbs.
 
You must log in or register to reply here.
Top