1989 Johnson 88SPL Does not pee at high RPM

It all started when it first overheated. I believe that something
clogged the intake while leaving a grass flat. The engine overheated
to the point it shut down. This motor only had 12 hours on the
rebuild and the paint was burnt on parts of the motor. I restarted
quickly and let it idle to cool itself. Every since that event, the
motor stops peeing at high speeds or high RPM. I changed the
impeller...seemed like there was a little difference...I could run at
regular running speed but if I trimmed the motor at all it would stop
peeing. I noticed the spark plugs were rusted then found that there
a tad bit of water leaking between the head and the head cover. I
replaced the head cover gaskets and no more leaks. Took the boat out
again and everythign was running great for about an hour....then it
overheated and started all over again. No peeing at high RMP or
speed. Took out thermostats....no difference. Checked hoses....no
clogs. I am getting clos eto my 20 hour check up. Could the head need
retourqueing? Spark plugs look great...no sign of water in cylinder.
ANy help woudl greatly be appreciated. Thanks in advance!

Doug

<dmcdona5.TakeThisOut@tampabay.rr.com> wrote in message
news:a5577bf5-2a76-43fa-aaa0-27c81ace65a8@a35g2000prf.googlegroups.com...
> It all started when it first overheated. ..... I restarted
> quickly and let it idle to cool itself. Every since that event, the
> motor stops peeing at high speeds or high RPM. I changed the
> impeller...seemed like there was a little difference...I could run at
> regular running speed but if I trimmed the motor at all it would stop
> peeing.


The "pee hole" shows the water flow as it just enters the motor at the
exhuast housing area. If it stops, then the pump is not delivering or an
exhaust leak is pushing back and you may see exhaust coming out of the
indicator hole.

Since the motor got hot enough to cook the paint (didn't you shut it off
when the alarm sounded?), the headgaskets and exhaust cover gaskets may be
damaged, as well as the rubber water deflectors inside the cylinder block.
Also did you only replace the impeller or did you put in the #5001594 water
pump kit?

Bill Grannis
service manager