Firing problem

Henry62

Cadet
Joined
Apr 25, 2010
Messages
6
100hp Mercury ran fine until sitting up for about 2 mos. Now it won't fire..changed plugs and same thing. NOTHING! Any suggestions?
 

SparkieBoat

Captain
Joined
Aug 17, 2009
Messages
3,643
Re: Firing problem

get a spark gap tester, remove all plugs and test for spark..should be a blue streak at 7/16 gap. if no cylinders are firing at all check kill switch/wiring. also make sure batteries are fully charged and in good condition. CDI electronics web site has a great trouble shooting guide..look in the support section.
 
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