Installing Impeller on 1992 MerCruiser Alpha One Gen 2

[ShaneCarroll]

First off, let me say thank you to all of the helpful members of this website. I can't say enough about Don S, and all the help he has given me (starting issues, pulley, etc.)
I would consider myself somewhat mechanically inclined, but my problem is as follows:
I can idle all day, and the temp stays normal, after going above 1/2 throttle, the temp creeps up to the higher end of the tolerance zone. Being cautious not to blow the engine, I slow down at this point or shut engine off completely. (Only happened on one outing, noticed halfway to destination, and on the way back.)
I just recently purchased this boat, and do not know when the last time the impeller was changed, but I believe the impeller to be the issue. A mechanic told me to replace impeller as well as thermostat with I believe a 140?
Is there a forum that I seem to have overlooked, or any links to installing an impeller? It seems easy, but I want to do it right, instead of worrying about a new motor.
Thanks again, and once again, I feel indebted to the people who constantly help: Don S, chiefalen, as well as the others. Thank you all very much.

 

[Bondo]

Re: Installing Impeller on 1992 MerCruiser Alpha One Gen 2

Is there a forum that I seem to have overlooked, or any links to installing an impeller?

Ayuh,...
There's Detailed Instructions in the Alpha 1, Gen.II shop manual found in the Adults Only sticky...

 

[betayv]

Re: Installing Impeller on 1992 MerCruiser Alpha One Gen 2

check this link

http://www.youtube.com/user/TcElectronicsMarine

 

[Don S]

Re: Installing Impeller on 1992 MerCruiser Alpha One Gen 2

check this link

http://www.youtube.com/user/TcElectronicsMarine

That's not a Gen II, wrong type of pump.
Same basic principal, but wrong type pump.

 

[ShaneCarroll]

Re: Installing Impeller on 1992 MerCruiser Alpha One Gen 2

Thank you all for the help, Bond-O, I found that section, and it helped me tremendously. I can't believe I overlooked it!! Anyways, for the first time, everything was a breeze until I went to put the lower unit back on, it was puttin up a fight.

Once again, thank you all.

 

[stonyloam]

Re: Installing Impeller on 1992 MerCruiser Alpha One Gen 2

everything was a breeze until I went to put the lower unit back on, it was puttin up a fight.

Been there, done that, learned my lesson. From now on pulling the outdrive and servicing it on the bench. Also gives you a chance to check out the bellows, universal and alignment.

 

[Revenge]

Re: Installing Impeller on 1992 MerCruiser Alpha One Gen 2

Once the water pump and seal housing has been removed, is it normal for the drive shaft to move slightly side to side? Or is there a bearing needing replacing?

 

[Bondo]

Re: Installing Impeller on 1992 MerCruiser Alpha One Gen 2

Once the water pump and seal housing has been removed, is it normal for the drive shaft to move slightly side to side?

Ayuh,... It's Unsupported,... Put it back together,+ it'll be Fine...