1998 40 hp mariner no top end

bikegod66

Cadet
Joined
Sep 26, 2006
Messages
17
i bought this motor last summer and when i got it to the lake it would only turn 3500 rpm's then it suddenly woke up and ran like a champ (5500)rpm. i only put it in the water one more time last summer (georgia drought) and it did the same thing. after it comes alive it runs great the rest of the time. it idles perfectly and starts great cold or hot. until today i have not ran it since august. i have however ran it on the hose every 30 days. well today it would never turn more than 3500 rpm's.

what the heck is wrong with this thing ?

motor is a 1998 3cyl 40 hp mariner model 40 elo
 

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: 1998 40 hp mariner no top end

More than likely you have weak or no spark on one cylinder.Get a spark tester
And check each cylinder.
 
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