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1986 Yamaha 40ELJ RPM issue

drobertsobx

drobertsobx

Member
Hi,
I'm looking at purchasing a boat. The current owner has told me the last trip out the motor would only do 1500 rpm wot.
I have never owned a oil injection motor but have noticed that they tend to have a limp mode for pump issues.
I would love to here suggestions on what might cause this issue so I can research part prices etc before I buy it.

Thanks
Don
 
Do a compression test before you buy it.------Check spark also.----I say it is running on 2 of 3 cylinders.------Oil injection is quite reliable on those.----Install a new impeller in water pump before you launch first time.
 
Last edited:
racerone said:
Do a compression test before you buy it.------Check spark also.----I say it is running on 2 of 3 cylinders.------Oil injection is quite reliable on those.----Install a new impeller in water pump before you launch first time.
Click to expand...

Thank you I will take both testing kits with me when I look at the boat. Guess I would know for sure right off the bat if he declines me to check.
 
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