Mariner 150 Sudden Power Loss

Firemike24

Recruit
Joined
Mar 18, 2017
Messages
3
I have a 1993 Mariner 150 EFI that has an intermittent power loss problem. Motor runs great without a hitch; and all-of-a-sudden its like something sticks and the motor won't go over 2000 RPM and boat runs rough (chatters)... In neutral it runs up to all the RPM's you want, but when back in gear its stuck at 2000 RPM max. This sometimes lasts just a few minutes; and other times it lasts hours. If you keep the accelerator engaged long enough - at some point it usually kicks back in; though there have been a few times that it doesn't. I have had it in the shop twice and been told it was repaired after a thermostat or a tuneup... And ideas?
 

Firemike24

Recruit
Joined
Mar 18, 2017
Messages
3
Thanks! - on a scale of 1-10 how difficult is replacing these do you think for the average guy? Trying to decide if I want to give it a go or take it to the shop???
 
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