1989 Evinrude 88 SPL (E88MSLCER) Exhaust Housing Leaking???

[drobertsobx]

New day new problem I think...
Both Heads completely descaled.
Both head gaskets replaced and heads torqued to 20 ft/lbs on the bench.
I have not retorqued the heads yet after the run gonna wait till morning.

I installed the motor to the outboard exhaust housing, torqued everything to spec...
I Used a chain hoist, everything went smooth as silk no hang-ups or
alignment issues slipped right on down smooth onto the drive spline. zero issues.

Hooked all electrical back up.

Primed her up, and she started right up on second attempt. Ran idle up to 1200 RPM
to test for overheat.

First thing I noticed I wasn't getting any water blown out of the two
exhaust holes (Last time run, it was spitting water not a ton but some onto my legs) just before the over heat issue.

The temp started rising on the top of the starboard side head first... not to an overheat but
warmer than I was expecting.

Starboard side (160-174+- Top of head): cycling with the thermostats. SEEMS HIGH for a fast idle
Port side was cycling at (150-160+- Top of head)
Both bottoms in the 140's at the overheat sensors.
Telltale water cold throughout testing.

I felt comfortable enough with the overheat issue I started looking around for leaks
or anything that didn't look right on the entire motor.

There is a bunch of water running out of the front area below the stud and bolt
for the exhaust housing on the starboard side, not from the base gasket and seems to be spun up
with the shaft. I never even looked up there on the initial run as it overheated so fast.
all my attention was with the laser on the heads.

Almost at my limit on this motor...

Can anyone hazard a guess as to what this is and if it is a problem, doesn't seem right to me?

 

[racerone]

the water that comes out the tell tale does not circulate through the motor.

 

[F_R]

Seal #72 is missing

 

[drobertsobx]

Seal #72 is missing

View attachment 390098

Thank you very much for the help...
I had replaced the entire pump this spring, I think the turbulent removal of the motor may have dislodged or broken something. The motor was salted in bad all screws caked and the base gasket had been leaking at some point freezing the motor and base with salt.
Just kept putting the salt away and penetrating oil to everything.
When it decided to come free it popped up violently on the chain hoist.

I just ordered 69, 70, 72 and 73

 

[ct1762@gmail.com]

Thank you very much for the help...
I had replaced the entire pump this spring, I think the turbulent removal of the motor may have dislodged or broken something. The motor was salted in bad all screws caked and the base gasket had been leaking at some point freezing the motor and base with salt.
Just kept putting the salt away and penetrating oil to everything.
When it decided to come free it popped up violently on the chain hoist.

I just ordered 69, 70, 72 and 73

these can develop an air bubble in the t stat housing, keeping the t stats closed or barely seated and not fully open. there is a notch to be made in the poppet valves to stop this happening. get it in the water and let it warm up to atleast 125f and rev it up with a quick blast... should clear itself. can't really diagnose these on the hose... not enough backpressure

 

[drobertsobx]

these can develop an air bubble in the t stat housing, keeping the t stats closed or barely seated and not fully open. there is a notch to be made in the poppet valves to stop this happening. get it in the water and let it warm up to atleast 125f and rev it up with a quick blast... should clear itself. can't really diagnose these on the hose... not enough backpressure

I am guessing you are correct... after replacing all parts I was finally able to test today for the leak... No leak
Pump seems very strong telltale the most I've ever seen from it.

test 1
Started with both hoses left off, both heads running strong flow of water.
Put hoses on started motor.
Temp slowly increased on both to 121 all seemed good
Then dramatic rise from 121 to 160 then alarm.
Good water flow at prop, 6 slots, telltale
Removed both hoses allowed to run till cool.

test2
Port side hose hooked up starboard left off.
Portside maintained proper temperature cycled as intended.
starboard of course cool
no overheat

test3
port side on starboard on...
monitored starboard... at 160 I pulled hose... it was vapor locked no water from head.
after about 5 seconds water flowed from head allowed to run till cool.

test 3 repeated 4 more times same results.

Something is causing the water to stop in the starboard head an air lock in the t housing would seem to explain this.

Unless test results show something else gonna do as recommended.

 

[drobertsobx]

these can develop an air bubble in the t stat housing, keeping the t stats closed or barely seated and not fully open. there is a notch to be made in the poppet valves to stop this happening. get it in the water and let it warm up to atleast 125f and rev it up with a quick blast... should clear itself. can't really diagnose these on the hose... not enough backpressure

and if this doesn't work the poppet valves will need to be notched?

 

[ct1762@gmail.com]

and if this doesn't work the poppet valves will need to be notched?

i would yes! this happens especially after the motor has been sitting for a few months.

 

[drobertsobx]

Notching the valves and reaming the air escape hole seems to have worked. Ran the motor on the hose both heads settled in at 145(p)-150(s) with 20 minute runtime, with no overheat alarm.
Temp cycled with t-stats on both and t-stats housing reflected head temps so gonna conclude that this issue is fixed.
Thanks to all for the help.

 

[ct1762@gmail.com]

Notching the valves and reaming the air escape hole seems to have worked. Ran the motor on the hose both heads settled in at 145(p)-150(s) with 20 minute runtime, with no overheat alarm.
Temp cycled with t-stats on both and t-stats housing reflected head temps so gonna conclude that this issue is fixed.
Thanks to all for the help.

yes some guys used a 1/8'' drill bit to ream the hole. if its clogged thats another way it will overheat. the old t stat housing have a tiny hole made larger in later years (or did they add a 2nd hole i forgot).