1982 Johnson outboard 60 hp 2 cly

[rodpaulrod]

What caused this problem with my head gasket

 

[racerone]

Possibly overheat?---Possibly water was trapped there and it froze.----Nothing to worry about.----Why did you take the head off ?

 

[rodpaulrod]

Possibly overheat?---Possibly water was trapped there and it froze.----Nothing to worry about.----Why did you take the head off ?

I took off the head because i thought the thermostat was bad. Next you ask why did think the thermostat was bad. I thought the thermostat was bad because i replaced the water pump man was it hard to line everything up right the exhaust part. After replacing the water pump. Noticed during idle it stall.
I thought the thermostat was causing a problem.
I will jump back to water pump after i did that Now since i replaced water pump and got everything hooked up and them exhaust ports because it was not done right. long story short pumps more water and i notice that comes out 2 other places in back little above the prop and also another relief hole right behind the prop. The reason i working on is now since replace water pump during idle notice the by time all them ports really start flowing good dang gum idle starts to act up and stalls some time.
Looks like only happens once the water starts pumping out them ports real good. happens ever time when all them water port are dispersing the water good. Like the water having some type of influence on the idle do not know how it doing this. Having That thought i thought i should look at the thermostat which i did and correct my writing " it did not look bad" to me was not stuck open but there where some grit around and might been open just a little. I assume the thermostat is not the problem and since i got this far. I going take the head off this engine. All the bolts came off nice. and cylinder are still i say excellent. I notice it looked like water corrosion in the head because notice gasket a white power came off are was under the gasket all through in the middle.
Maybe head gasket was problem i done on a engine almost exactly like this one before. I think will make better.
i going have to just swing it and maybe and not idle to long i keeps stalling like it was. But other that that good engine.
Going to wait for parts to come in mail they I going put it back together but i do not want to under estimating all things that can go bad might.

 

[saltchuckmatt]

You will want to flatten that head now that it's off. Dead flat surface, 120 sand paper laying on the flat surface and do figure 8 patterns on it until it's shinny everywhere.

Once you get it running you need to check head temp even if it's pumping water correctly. IR gun or check with your hand. Hot to the touch but not scalding.

You might have some internal flow issues.

 

[rodpaulrod]

You will want to flatten that head now that it's off. Dead flat surface, 120 sand paper laying on the flat surface and do figure 8 patterns on it until it's shinny everywhere.

Once you get it running you need to check head temp even if it's pumping water correctly. IR gun or check with your hand. Hot to the touch but not scalding.

You might have some internal flow issues.

Ok thanks for the help

 

[ct1762@gmail.com]

yep just to clarify temp is taken at 900rpm at TOP of the head. these models have a nice flat spot for the old thermomelt sticks... now we use IR guns. temp MUST be between 125-152.5f after 5 minutes. on these motors the rubber exhaust seal must be in good shape and not pinched. you will know its good when after its warm water will spray out the upper relief holes when in the water. on the hose it wont if a tiny bit so must be in a bucket. if it doesnt it will run on the verge of overheating and no water. water should not come out when its cold.