Johnson 150 V6 cooling system

S

searay180

Recruit
Joined
Mar 19, 2008
Messages
1
hi

I have a 1988 Johnson 150HP V6 outboard. Does any one know if we should have a stream of water coming out of the exhaust ports that are just below the engine cover or should just gasses come out of them. At the moment when running at speed we have spits of water and steam coming out. Could this be a problem or is it just a poor fitting exhaust gasket allowing some water to leak into the exhaust chamber. We have a good strong tell tale which only gets luke warm at speed, it has had a new impellar fitted and the thermostats seem to be working fine.

Any help would be much appreciated.
 
tashasdaddy

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Johnson 150 V6 cooling system

those are exhaust relief ports for when the motor is idling, and not enough pressure to blow the exhaust thru the prop. at speed the exhaust should go thru the prop. should not be steam. chek your plugs, for any of the looking especially clean (steam cleaned) could have a problem.
 
B

Big Bubba

Senior Chief Petty Officer
Joined
Apr 11, 2007
Messages
746
Re: Johnson 150 V6 cooling system

That is normal. You will get steam and misting comming out when you are using the muffs with the garden hose and when it is in the water or lake floating then you will get more water comming out of it when the thermostats open and close and also to keep the exhaust cool with the water. You should be good to go. Take care, Bob:)
 
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