Help 7.5 Mercury 110

H23356hey

Recruit
Joined
Feb 22, 2018
Messages
5
Working on a 7.5 Mercury 110. Put new coils. New cdi box new plugs. Has 100psi compression getting a spark. But does nothing used starter fluid nothing. It’s really easy to pull and feels like it doesn’t have good compression but it does. I’m puzzled anyone have any. Ideas. Thinking the stater but if that’s the case it wouldn’t spark correct ???
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
51,921
A 7.5 is a 75, the 10 hp was also called a 110 and a 100 depending on which year it was produced.

post your serial number and some of the outboard experts will be along shortly.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
39,270
Is there a decal on the block that says --" comet "-----What happens when you switch wires from the cd to the coils ?---Does spark jump a gap of 3/8" or more, yes or no ??
 
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