Steam from exhaust relief ports

[sidenberg]

I have discussed this issue before regarding the steam that comes from the exhaust relief ports of my 1987 Force 125. It occurs during idle and lower speeds in the "no wake zone" only. I understand that most of the exhaust and cooling water flow from these ports at low speed due to back pressure from the exhaust snout being low in the water. However I am trying to determine if the amount of steam is normal because blows out like a steam locomotive. The engine runs great and does not overheat. The cooling water temp is about 115 degrees at idle and the flow seems normal I guess. The sea temperature here is about 58 degrees with a air temp about about 60 degrees. I installed a new impeller however the water pump housing was a bit corroded. To correct this I used some jb weld and then sanded the housing smooth. All the spark plugs look good with no evidence of water entering the cylinders. Given this info would you say this is normal or could the water pump be weak or not working properly?

 

[foodfisher]

Re: Steam from exhaust relief ports

Sounds normal, but can't see the amount. A telltale would aleviate water circulation worries.

 

[pnwboat]

Re: Steam from exhaust relief ports

That's normal. The colder the outside temperature is, the more steam you'll see. When fishing earlier this year with my 1988 125HP, in the early mornings w/air temps in the upper 50's I saw quite a bit of steam at idle speed. Now the air temps are in the 80's - 90 degrees and the amount the steam at idle is hardly noticeable. My engine temperature gauge stay's steady at 130 degrees regardless of outside air temps.

 

[jerryjerry05]

Re: Steam from exhaust relief ports

That's normal.J