90 HP Merc 4-stroke spark plug change?

Georooney

Seaman
Joined
Sep 29, 2009
Messages
51
How often should I change spark plugs? I've had the boat and motor for several years, and haven't been having any problems. The previous owner was a mechanic, and was anal about the maintenance. I go out on the west coast (BC) and don't want to get stuck one day, is all.

So, maybe this question has been asked here 1,000 times before but I can't find the answer......mea culpa. :)
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,072
Re: 90 HP Merc 4-stroke spark plug change?

Change them every year.Carry a spare set in the boat along with tools to change them.4 strokers don't foul out like 2 strokes and the plugs last longer.J
 
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