1988 Johnson 90hp (overheating final bash)

[scottygethotty]

Hi

I just wanted to thank everyone who has helped me out on this site, you guys are great and very knowledgeable thanks..

After over heating and nearly setting on fire my engine i have taken the case covers off to show the gasket, the thermostats are pretty new so don't think its them.

I cleaned the salt deposits out of the heads and in the morning i'm going to put the heads back on with the gaskets, i got new hoses and cleaned the thermostat housing, theres a new impeller and new plugs.

so fingers crossed i cant see what else it could be to cause the engine to overheat or at least the alarm to go off.

any thing else i should do before my next voyage?

 

[emdsapmgr]

Re: 1988 Johnson 90hp (overheating final bash)

If there is that much salt under the head covers, I'd wonder about the passages around the cylinder liners. I'd probably pull the heads and check, making sure the 4 rubber water diverters are in good shape and that water can circulate around them properly. Also, you might want to pull the voltage regulator off the top of the block and have a look in there also.

 

[kenmyfam]

Re: 1988 Johnson 90hp (overheating final bash)

If there is that much salt under the head covers, I'd wonder about the passages around the cylinder liners. I'd probably pull the heads and check, making sure the 4 rubber water diverters are in good shape and that water can circulate around them properly. Also, you might want to pull the voltage regulator off the top of the block and have a look in there also.

Completely agree. There's a lot more caked on stuff restricting your cooling flow deep within I am sure.
Better do it right than fry the motor and start again.