1970 4 hp Evinrude stops suddenly

[twocyclemania]

see on the recoil post... btw not hard to fix

Thanks!

 

[twocyclemania]

Thanks everyone! It's up and running and cooling nicely now. At first I though it must be some other problem as it was still overheating. I did notice that (in the barrel) a lot of water that stayed cold was coming out the leg holes even though the block/head were getting extremely hot. I thought I had managed to get the water pipe into the pump when I put the power head on but obviously not. Dropped the lower unit and sure enough I missed. I should have dropped the lower unit from the beginning.

Seems that the little hard buildup (brown - probably dried mud) that blocked the exhaust cooling chamber exit hole (on top) was the problem all along. Running great now! (I'm going to start a new thread about the recoil - another story). thanks!

 

[twocyclemania]

Was up and running and running very cool in the barrel. You could put your hand on the head. This was without the prop. After I put the prop on and ran it the head was very hot (sizzled when I sprinkled water on it). I haven't taken the temp of the block yet but the head is very hot. ???

 

[Crosbyman]

running a 4hp in barrel creates lots of air bubles sucked up the water pump which prevents cooling the ph.

try the engine on the water

 

[twocyclemania]

running a 4hp in barrel creates lots of air bubles sucked up the water pump which prevents cooling the ph.

try the engine on the water

Thanks; starting to think I was going crazy. I'll run in on the lake and let you know. thanks again!

 

[Prop head]

Does the thing have a thermostat? Check that it is working properly. If it is not opening it will not allow fresh cool water into the engine once it is reached temp.

 

[racerone]

The 4 HP model like that NEVER had thermostats installed !