120 hp Force impeller replacement

[kenlynn]

have water in lower unit on 1991 120hp Force.just bought this old engine needs impeller to I guess no water coming out of hole. How hard is it to change impeller and seals to stop water from getting into lower unit Ken

 

[john from md]

Re: 120 hp Force impeller replacement

Changing the impeller is rather easy. Changing the seals in the lower requires you to be mechanically inclined and have a good set of tools.

You can learn about changing the impeller from a sticky at the beginning of this forum.

John

 

[kenlynn]

Re: 120 hp Force impeller replacement

hey john would that be the drive shaft seal not leakin oil out of lower unit just between were lower unit bolts on
can u change that seal from top i think on mercury u can Ken

 

[john from md]

Re: 120 hp Force impeller replacement

If you are talking about water in the middle leg, I wouldn't worry about it. It drains out and doesn't create any issues. It is never high enough to cause problems. Mine does it and I operate in salt water. I just put a hose in it and rinse it when I put the engine on the muffs.

The area around the water pump is drained by four or six holes under the cav plate. These you want to clean out from time to time with a drill bit or piece of wire to make sure they are open.

John

 

[kenlynn]

Re: 120 hp Force impeller replacement

I put new oil in lower unit when i bought it when i put the ears on and started it up in started leaking white creamy oil out from where the lower unit bolts on pryor to that it was leaking clean oil out before i started never drained lower unit to see if it had water in it are not after i ran it

ken

 

[john from md]

Re: 120 hp Force impeller replacement

You don't have to drain it to check for oil. Do the following.

Let the engine sit straight up and down for a couple of days. Break loose the drain plug but don't remove it. DON'T TOUCH the Fill and Vent plugs.

Position a tupperware or some other clear plastic container under the drain plug. Start unscrewing until fluid starts to come out but DON'T remove plug from threads entirely.

If you have water in the oil, it will run out first. If you see a teaspoon full, it is from condensation and can be disregarded. If you get alot of water and milky oil, you have a seal leak and it must be fixed before use.

Leaks can be from bad washers on the fill, vent and drain plugs, from the prop shaft seal or from the drive shaft seal. Replacement of the prop shaft seal and driveshaft seals require good mechanical ability and knowledge.

John