1976 evirude 4 hp

[seahorse56]

just bought it , it was sitting for 2 years , took it home and put it in can of water and it fired up after about 10 pulls. my ? is where is the heated water supposed to exit the motor ? i dont see any water discharging so i know the impeller is bad , i see about 2 rows of pencil lead sized holes so im gueesing that the exit point , also how does the water cool the engine ? i dont see any water jackets or channels for the water to flow through to cool the power head. im new to outboards thanx for the info

 

[Vic.S]

Re: 1976 evirude 4 hp

just bought it , it was sitting for 2 years , took it home and put it in can of water and it fired up after about 10 pulls. my ? is where is the heated water supposed to exit the motor ? i dont see any water discharging so i know the impeller is bad , i see about 2 rows of pencil lead sized holes so im gueesing that the exit point , also how does the water cool the engine ? i dont see any water jackets or channels for the water to flow through to cool the power head. im new to outboards thanx for the info

Most of the water leaves with the exhaust but you should see a little, a few drops or a mist, from the exhaust back pressure relief holes on the leg.

there are water channels within the cylinder block and head.

There is no tell-tale on this model

You should be able to touch the head or block and maintain contact for several seconds, except around the spark plugs and the (un-cooled) exhaust manifold cover. If it is too hot to do that it is getting too hot!

BTW correct fuel mix is 50:1 and the plugs should be J6C gapped at 0.030"

Check the gear case oil before you use it. Milkiness indicates water ingress.

 

[DJ]

Re: 1976 evirude 4 hp

I have the same engine.

You should see water exiting, in a spray, from the row of holes you described. They do get clogged sometimes.

While the engine is running, in a bucket or barrel, put your fingers on the top of the head. If you can hold them there for a count of three, it is not overheating. It's about 140*.

Mine had a clogged cooling port under the powerhead. It was an easy fix but yours proabably does not have that problem. Mine has a LOT of hours on it.

 

[seahorse56]

Re: 1976 evirude 4 hp

ok , i did see some mist leaving the holes , but are you saying most of the water exits with the exhuast where you cant see it? and the best way to know the water is flowing is by the temp. of the power head , i have a manual on order i should have it next week , also when i checked the gear oil in the lower end it was empty , i think one of the seals are bad

 

[Vic.S]

Re: 1976 evirude 4 hp

but are you saying most of the water exits with the exhuast where you cant see it?

Yes

and the best way to know the water is flowing is by the temp. of the power head

Well, yes .. after all it's the temperature of the thing that's important.

when i checked the gear oil in the lower end it was empty , i think one of the seals are bad

If is was mine I would replace the seal in the gearcase head , the O ring, the driveshaft seal, the filler plug seal and while the gearcase is off replace the pump impeller too.

 

[Haffiman]

Re: 1976 evirude 4 hp

I would have invested in a new head gasket, exhaust cover gasket, upper water tube grommet and impeller.
Replace gear oil, and be sure you have some spare share pins for the propeller.
Then it is probably good for another 20 yrs.