Does my Johnson have a pee hole?

[whitejamie99]

Wow that subject line came out funny. I have a 1977 115HP Johnson. I have changed the water pump and it is now running. How do I tell if the pump is operating correctly? I have the unit running on muffs but I dont know if it has a tell tale or pee hole. I ran it for 5 minutes and no warning horn.

 

[phatmanmike]

Re: Does my Johnson have a pee hole?

i dont think omc had pee holes till 78, maybe it WAS 77.... anyways......<br /><br />do you have water coming out at the prop and around the holes on top of the anti-cav plate?<br /><br />can you lay your hand on the cylinder head for 3 seconds?

 

[BoatBuoy]

Re: Does my Johnson have a pee hole?

My '77 35 hp Erude has a tell-tale - starboard side, but I'm not sure all '77 models had them.

 

[whitejamie99]

Re: Does my Johnson have a pee hole?

I can lay my hand on the cylinder for just about 3 seconds but not much more. No water was showing in the hoses at the thermostat.

 

[whitejamie99]

Re: Does my Johnson have a pee hole?

Yes water was coming out the prop and at the anti-cav plate.

 

[REELSPORT]

Re: Does my Johnson have a pee hole?

laying your hand on the clinder for only 3 seconds before you have to take it off sounds like it is running a little to warm. Might want to check thermostat to make sure it is not stuck closed or almost closed. good luck

 

[whitejamie99]

Re: Does my Johnson have a pee hole?

Thermostat (spring with wax sensor) and bypass valve (small impeller and spring) are both out of the engine awaiting new parts. Vernatherm is in and may be the culprit. Parts are on the way - thermostat kit with gaskets, etc. My main problem is finding out whether or not my impeller is functioning correctly. Would be good to know before I take it to the lake.

 

[phatmanmike]

Re: Does my Johnson have a pee hole?

run the motor with the thermostats removed and all thermostat covers OFF the engine. you should see water gushing from were the stats go.

 

[whitejamie99]

Re: Does my Johnson have a pee hole?

Thanks myoutboards. That sounds logical. I will try that tonight and post back in the AM<br /><br />Jamie

 

[whitejamie99]

Re: Does my Johnson have a pee hole?

Put boat in the lake but left it on the trailer. No water came up through the hoses and the thermostat area is dry as a bone. After about 5 minutes, cylinder heads were very hot and alarm went off. Shut it down and went home.<br /><br />The lower unit is at the shop but the pump is intact. I think the key didn't get installed correctly but I dont know