1989 90hp yamaha outboard oil pump

xltjon

Cadet
Joined
Oct 8, 2025
Messages
7
I have a 90 etlf Yamaha outboard which is a 1989 90 horse I bought a pontoon the motor came with it the oil tank all the lines everything has been taken off and the nipples have been plugged what I'm wondering is should I leave the oil pump on there even though it's disabled or take it off and try to find a plate cover for it I'm having a problem finding a plate without having on made I'm just wondering if it would hurt the motor to leave the oil pump disabled but attached to the motor I don't know anything about this motor I haven't ran it when I bought it it needed a lot of work but has 120 lb compression on all three cylinders so it has potential thank you
 

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
9,318
Without oil running thru the pump and the gear riding on the crankshaft, I would think it would be a bad idea.
remove the oil pump Drive shaft and gear
 
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