89 Force issues

[brianwebb]

I ordered a new impellar for my 89 50 hp Force engine. I had some questions that I was concerned about. When I took off the lower end of the motor I noticed milky-grey oil floating over the impellar cover and and around the lower end unit. The impellar had stiff rubber, but I will still change it. Will this make a difference??? I also ran a coat hanger up into the impellar tube that goes to the motor and didn't notice anything unusual. My main concern was when you reinstall the lower unit where the impellar cover goes to the feed tube, Is there a rubber hose that connects those two, so the water doesn't leak out between the pump and the motor??? The thermostat works good, just can't get water to the motor. Another possible problem would be that I do not have the motor deep enough in the water? just below where the lower end unit attaches. I notice smoke coming out of where the lower end unit bolts on. Also when you remove the old impellar do you pull the pin, that keeps the impellar moving, or do you remove the bushing above the shaft where it connects to the motor?? Thanks for any help. At one point i removed the impellar and put it back in, and I got water coming out of the two exhaust holes, everytime I excellarated I got hot water coming out, but NOT CONSISTENTLY. Then it just seems as tho it trickles, out but the water is not circulating???? Is there a gasket that needs to go on the lower end to seal, and what type of gaskets does the water pump need? All I see for a gasket is a metal one, and thats it???
Brian

 

[john from md]

Re: Help Please, 89 Force issues

Re: Help Please, 89 Force issues

One thing at a time.

The milky grey oil is not a good sign. I would drain your lower and see if it has water in it. If it does, you need to do a reseal of the lower before proceeding.

The impeller should be flexible and not hard. If it is hard, it will come apart shortly.

The water pump housing has a port that has a nylon insert that connects to your water tube. If you don't have this insert, your water will not get up the tube.

The two ports behind the leg are relief ports so that the engine will start easier in the water. They will spit water and exhaust when the engine is running. The bulk of your exhaust and water go out through the snout behind the propeller.

The pin is actually called a key. Sometimes this will stay in place when you pull the impeller off, sometimes it comes loose. You must slide the impeller and its insert (do not try to separate the insert with the key way from the rubber as you will destroy the impeller) onto the key and push down until flush.

Hope this helps,

John

 

[brianwebb]

Re: Help Please, 89 Force issues

Re: Help Please, 89 Force issues

I guess I don't have the nylon insert, and thats probably why I'm not getting good water circulation. To change the impellar do I need to remove the key and slide the impellar and housing off pushing down, towards where the shaft enters the lower end, or remove the bearing at the top of the shaft and do it that way??? The milky grey oil, i'm not sure where its coming from, but i'm wondering if that is from oil mixing with water?? Do you need to have a seal on the lower end unit, or is it fine just bolt it back in place??
Thanks, can you let me know where i can get the Nylon insert??
Brian

 

[john from md]

Re: 89 Force issues

The impeller is replaced by sliding it up the shaft and sliding the new one down the shaft. Make sure the key is inplace before putting the lower back together.

Do you know where the drain screw is on the lower? If so, remove it without taking out the fill or vent screws. This will let some oil drip at a slow rate. If the oil is milky, it is contaminated with water.

Try mercruiser.com or crowleymarine.com for parts for your water pump housing.

Oh, and buy a manual.

Regards,

John

 

[brianwebb]

Re: 89 Force issues

Ok, so how do I get the bearing off of the top of the shaft where it enters the motor? When I first removed the lower unit I found a cotter pin laying next to the shifting rod, emersed in oil. What did this pin go to??? it didn't go to the shifting rod because there was one already in place holding it, that I had to remove. Also I believe the nylon insert was what I was looking at this afternoon that attaches to the inside of the impellar housing, so it does have one. Do I need a gasket on the lower end to create a seal????? I will drain the lower end oil tommorow to see if it has water in it, but I believe when i checked it before, all i saw in there was pure white oil, is this contaminated gear oil???? I know I mixed the gasoline rich with the marine oil, would this cause the milky-grey oil at the bottom of the lower end???
Thanks for all the help guys, I do appreciate it!
Brian

 

[brianwebb]

Re: 89 Force issues

would pictures help???

 

[brianwebb]

Re: 89 Force issues

I noticed on a diagram that the water line inside the leg is curved on the 89 50 force, how difficult is it to remove this to check for blockage, I guess when I ran a coat hanger in there, it only went to where the line curves, is there anywhere on the motor I can checked for blockages, while i'm working on the lower unit that could be plugged? I know the ports inside and around the head are spotless, as I have checked that, but someone on here mentioned lines that played a role in the cooling.
Thank You

 

[john from md]

Re: 89 Force issues

Pure white oil is contaminated with water. Good oil is a dark color with no milky color at all.

The water pump housing has a gasket and a stainless steel plate that the impeller rotates on. There is also a shaft seal on the impeller housing. These are the only seals for the water pump.

When the pump is removed, there is a long plate under it and it has seals that seal water out from the lower. Water can enter the lower from this plate as well as from the prop shaft seal.

I know of no bearing on the drive shaft above the water pump. The top of this shaft is geared to insert into the power head.

Pictures would help. If you can't post them here, send them to johnandnanc182@yahoo.com

John

John