Classic SeaCraft Community - Mercury 200 EFI water pressure problem.

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- - Mercury 200 EFI water pressure problem. (http://www.classicseacraft.com/community/showthread.php?t=18029)

pawill2

06-26-2007 11:13 PM

Mercury 200 EFI water pressure problem.

I have a water pressure gauge and the water pressure jumps up and down alot. I have replaced the water impeller and housing. Any thoughts?

NoBones

06-27-2007 12:11 AM

Re: Mercury 200 EFI water pressure problem.

Remove the tube and blow air through it. More than likey a piece of trash lodged in that tiny tubing.
Also did you replace the pop-it valve???
Ken

SECF3114M73J

06-27-2007 11:24 AM

Re: Mercury 200 EFI water pressure problem.

The pressure will vary between idling and running at cruising speed. My Optimax runs 3-4 psi at idle and 12-14 psi at cruising speed. Does the motor over heat? Also check thermostats.

eggsuckindog

06-27-2007 10:09 PM

Re: Mercury 200 EFI water pressure problem.

Mine is all over too no problem

Fr. Frank

06-27-2007 11:50 PM

Re: Mercury 200 EFI water pressure problem.

You need 7-8 lbs at cruise, and 3 lbs at idle at a minimum.

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