1968 mercury 35 ho lower plug no spark . help

scot

Seaman Apprentice
Joined
Jun 30, 2000
Messages
36
Hi i Just bought a 1963 cruisers inc boat with a 1967/68 mercury 35hp and trying to get it running. lower plug has no spark. what to do to fix this?
 

RCO

Petty Officer 1st Class
Joined
Jun 15, 2016
Messages
350
The 68 350 still uses magneto ignition. Most likely you just need to clean and adjust the points.
 

Chinewalker

Fleet Admiral
Joined
Aug 19, 2001
Messages
8,902
Pull the flywheel off using a flywheel puller. DO NOT undo all the bolts at the hub! You may need to remove two bolts to use a harmonic balancer puller. I can't recall if Mercury had the threaded hub on those yet. In any case, start with cleaning the points and gapping them at .018". Failing that, if the coils appear good, they likely are. Condensers can be a weak spot on those, too. Check plug wires for cracking.
 

scot

Seaman Apprentice
Joined
Jun 30, 2000
Messages
36
ended up at the boat dr and it was wired up wrong from the guy I bought it from. runs now tnx
 
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