Oil in water tank

proline90

Cadet
Joined
Jun 13, 2010
Messages
7
I just purchased a 1996 5hp Mercury, after running it in water tank for the first time, I see oil in the water. there was also quite a bit of smoke while running. Any ideas?
 

kmarine

Chief Petty Officer
Joined
Nov 5, 2010
Messages
591
Re: Oil in water tank

This is normal, unburnt fuel and oil with smoke until engine warms up. A cold engine can waste up to 40 % of fuel during warm up.
 

proline90

Cadet
Joined
Jun 13, 2010
Messages
7
Re: Oil in water tank

Great, I thought It might be leaking. How long does warmup usually take? I will have to find a manual so i can get specs for plug gap and fuel mixture ratio maintenence.
 
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