1982 mercruiser 470 overheating

D

davidandsara

Recruit
Joined
Jun 28, 2012
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3
We need help please, we have a 1982 mercruiser 470, the boat prior to replacing the impeller worked fine, but since the replacement it now over heats.... Need some much needed advice as to maybe we have it backwards, or what might be causing the problem! Thanks everyone!
 
Bt Doctur

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,507
Re: 1982 mercruiser 470 overheating

exactly what parts did you replace, kit number?
 
D

davidandsara

Recruit
Joined
Jun 28, 2012
Messages
3
Re: 1982 mercruiser 470 overheating

Shift , u joint, exhaust, bellows, lake water feed line from the out drive to the transom, impeller in the lower unit
 
NHGuy

NHGuy

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May 21, 2009
Messages
3,631
Re: 1982 mercruiser 470 overheating

That hose from the bellhousing to the transom is easy to muck up. Make sure it has no kinks. If it looks good do a pump test, which is, pull the hose inside the boat and run the motor for 15 seconds in the water, not on muffs. You should get a nice bucket of water. If not, check your impeller job. There is a normal expected amount of water that I'm sure someone will chime in with.
Good luck.
 
F

fmalott

Chief Petty Officer
Joined
Jun 28, 2010
Messages
561
Re: 1982 mercruiser 470 overheating

NHGuy said:
That hose from the bellhousing to the transom is easy to muck up. Make sure it has no kinks. If it looks good do a pump test, which is, pull the hose inside the boat and run the motor for 15 seconds in the water, not on muffs. You should get a nice bucket of water. If not, check your impeller job. There is a normal expected amount of water that I'm sure someone will chime in with.
Good luck.
Click to expand...

i will have to agree with NHGuy when i did my bellows, impeller, raw water hose on my 83 470 it took me at least three times to get the right length on the hose so it would not kink you should be able to see the hose if it's kinked on your MC-1 outdrive, just look through the side of the bell housing and gimble housing you should see the hose you might need a flash light to see better
 
D

davidandsara

Recruit
Joined
Jun 28, 2012
Messages
3
Re: 1982 mercruiser 470 overheating

Thank you everyone for your advice, we took it to the lake last night and it worked great! We really appriciate It!
 
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