Mercury Sport Jet 90 Oil Leak

Joined
Feb 23, 2013
Messages
15
I have 1993 Sea Rayder F14 with a 90 hp Mercury Sport Jet engine. Everything runs well except for an oil leak at the bottom of the engine under the oil injection pump. I carefully installed a brand new pump and o-ring and the inlet and outlet hoses but the leak is still there, about 1/4 cup of oil per hour. I felt around the bottom of oil pump and hoses but nothing was wet so it appears that the leak could be coming from somewhere else. There is no smell of gasoline and the leaking oil is a blue-green color, the same as the oil I use in the injection oil reservoir. It doesn't appear to be the blacker gear oil from the drive unit. Help! I don't know how to fix it. Has anyone else had this problem?

Does anyone know a good Sport Jet mechanic in the Fort Myers area?
 

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Last edited:

Grub54891

Vice Admiral
Joined
Jun 17, 2012
Messages
5,908
Re: Mercury Sport Jet 90 Oil Leak

I'd replace them hoses. Also that screw clamp could not be sealing properly.they dont conform easily on them small tubes. I'd put spring clamps on it or pull ties? My 2 cents.....
Grub
 
Joined
Feb 23, 2013
Messages
15
Re: Mercury Sport Jet 90 Oil Leak

Right on. I replaced the small worm screw clamps with band clamps that have a side bolt and it fixed the leak. Thanks for the heads up.
 
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