Seems to hot to me

[OFF THE CLOCK]

Hello to all.

I would like to first say that I'm glad there is forms to help others in need with things they enjoy. 2 I'm also in another form on old Goldwings and do my best to help others with there issues getting them up and running with the unwritten information you can't find in any manual. So right up front thank you for helping others out.. I was raised in Florida around 115 v4 Evinrude engines. I've owned 2 of them and they went down due to ring failure. ruined the wall. I'm tooled for major overhaul type repair and do have a manual. I wouldent consider myself a rookie around an outboard engine. but I don't know everything. I managed to pick up a 1985 Johnson J90TLCOS for next to nothing. As soon as I got it home I replaced the water impeller with housing kit thermostats kit. Cleaned out the carburetors top to bottom. new plugs fuel line filter and a fresh source of 50/1 gas mix. e10 free. When I fired it up it ran like 4 drummers hitting @ the right tune. Not like a loose or old engine would run, bang...bang.. .ba,.. ba.. bang.bang. This engine is super tight. When I cracker the throttle it was right there. The idle seems a bit slow but the engine don't shake the steering linkage. As soon as I started it I put my thumbs on the top of the heads to check for heat. (older Evinrudes I've had would run not to hot 1974 115 crossflow. But this one is warmer for sure. I put the lazer on it it slowly climbed to 150 the engine started to change tone and slow down then I shut it down. I fear of overheating. I restarted it it repeated the same thing tone change then it died. I let it cool down 90f removed the hoses to the thermostats let it run out of the heads it idled for 15 minuets no issues.

Tonight I removed the lower unit thermostat housing hooked a hose to the input tube ran water into it it ran out the heads checked inside the thermostat housing (engine side) with compressor air and a rubber tube looked up into all the holes for blockage in the engine All is clear. Did I miss something?

when I installed the thermostats into the block the cork was under them they are facing the right way (removed and replace) just like it came out there was a new looking t stats in it purple color springs and no trash around the plastic caps. There is flow out the pisser should I remove the heads and go further or run with no t stats? Either way I don't want to hurt this tight engine Alarms work no alarm. But that don't mean there good @ the block side. censor might be bad 160 seems hot to me for running temp to hot to keep your thumbs on never had an engine run that hot ever.. T stat removal or no? I also checked the little holes for blockage and super cleaned the inside where they rest all is clean all is clear. Any comments would be great. Thanks for reading .. Signed OFF THE CLOCK..

 

[Boobie]

Where are you running the motor ??

 

[OFF THE CLOCK]

I ran it in the big drink sitting on the trailer in when this started happening the first go around. It would idle and die. Took it home replaced listed above same issue removed the hoses from the heads it ran fine.

 

[faztbullet]

Your chasing a ghost as reading head with laser temp will be higher, with a laser you read the t-stat housing to get correct temp.

 

[OFF THE CLOCK]

Your chasing a ghost as reading head with laser temp will be higher, with a laser you read the t-stat housing to get correct temp.

The temp at the housing is 140+ it won't idle while the hoses are connected to the heads heats up then dies. I disconnected them idle returns with no issues.

 

[OFF THE CLOCK]

This stills don't explain why it will die when it's hot and run fine without the hoses connected. Like I said before I went through the bottom to top except removing the jacket covers to see if there is a restriction. But I don't think there is for the water flows out the heads both sides . engine runs fine throttle response is fine under load. You can hear the engine change tune through the prop load up and die. hope this helps your comment to question

 

[OFF THE CLOCK]

Well here is the update. I took the thermostats out and bolted it back together and ran it out in the big drink. Again same thing happen this time the hot horns went off. So I again pulled the hoses off the heads fired it back up after letting it cool. They went quiet went back to the ramp. Am I missing a passage somewhere? I went through the bottom end and went through the top water passages. The only thing I didn't do was pull the powerhead or the face plates around the heads. Any idea on where to look for blockage? The engine sat a year so I'm sure something got blocked but where to look. Information would be great thanks..

 

[Boobie]

Have you had the heads off and checked the water deflectors as they may be swelled up ??

 

[OFF THE CLOCK]

Have you had the heads off and checked the water deflectors as they may be swelled up ??

No I want to check all other points first. Someone said there is a valve other than the 2 spring valves. The water is forced into the engine while underway This valve opens and allows for more cooling either it is stuck open not allowing the water enough time to cool the engine down. Or closed not allowing any water out. The hoses are removed thus the only way the engine will run cool. i removed the tstats and hooked the hoses back up still runs hot so there is a blockage in the return somewhere. The name of the valve escapes me.