impeller replacement

[yournamewilldo]

After having read and read about all the problems with over heating, just to be on the safe side I bought a impeller for a 1987 Force 50. Handy with tools and usually can follow instructions fairly well. Now the problem I want to install the impeller and understand that it is in the housing. Which housing? Terminology may be wrong but please bare with me. The lower unit I know is where the prop is. There is another housing connected between the top of motor and the lower unit. Wher should I unbolt it? Lower unit or up at the bottom Of the engine? Thanks for all the help I have already got, hate to be a bother. Thanks.....Tom

 

[jim dozier]

Re: impeller replacement

First, buy a manual. The lower unit contains the transmission in the torpedo shaped bulge that the prop shaft comes out of and the drive shaft which sticks out of the top and extends all the way up to the power head (motor). Most of the length of the drive shaft in hidden in the middle unit which is basically a hollow housing for the exhaust on 1 side and the drive shaft and shift shaft on the other. Also there is a water tube that connects the water pump to the powerhead. The water pump sits on top of and is bolted to the lower unit with the drive shaft running through and driving the water pump. The impeller is a rubber vaned gizmo that turns inside the water pump housing (shell). The impeller is the thing that is usually replaced. Sometimes the housing may need replacing also. The lower unit bolts to the bottom of the middle unit with a series of bolts and/or nuts just above the cavitation plate which is the flat horizontal plate just above the top of the prop. If the bolts are removed and the shift linkage disconnected the drive shaft and lower unit will lower (fall) out.

 

[scotiany]

Re: impeller replacement

And you don't even need to take the prop off.

 

[catfish1]

Re: impeller replacement

yea, you should get a manual. now i hav'nt done this in several months but you'll get the idea! <br />first loosen all four nuts that hold the lower unit on, take 3of them off and leave one just holding on by two or three threads, when you drop the lower unit down it will stop at that nut. then you will see the shift rod with the cotter pin through it, pull the cotter pin out, and take the last nut off and its ready to drop out. when you pull the impeller case off pay attention to which side of the impeller the shaft pin comes out because you can put the impeller in upside down if you dont pay attention to this. and pay attention to which way the impeller veins are bent over, you'll want to get everything in the same way it comes out. the hardest part of it all is getting the lower unit lined up to put it back on.<br />if i'm wrong about anything i'm sure someone will correct me!

 

[yournamewilldo]

Re: impeller replacement

Ok will loosen all the bolts on the dohicky at the bottom then take three out then lower the dohicky, pull cotter key out of thingmajig take last bolt out. Pay tention to which way the water wheel comes off and which way the pin comes out pay tention to which way all them whatchamacallits are pointed. Then git everything lined bac up and slam that baby in there. Darn and I don't even need a hammer.<br />Anyway thanks guys could not do it without your help.<br /><br />Tom

 

[yournamewilldo]

Re: impeller replacement

catfish, great instructions, you only left out one step, put in forward gear, however I had read somewhere else where someone was asking about what gear to have it in, so tried it and it worked. You can bet I will replace the impeller every year after seeing what happens to them when they remain idle.<br />Thanks for all the imput guys