Over heating

[Whitney tx]

I have a mercuriser 260 1983 mercuriser 260 cobalt boat it is over heating i was told it could be the impeller pump i replaced it not sure if i did it right i put it back toghter and hooked my water hose to it started it and let it idle and it got hot again when you put the impeller on do you put it in the housing or do you slide it on the shaft then put the top houing on can some one help me

 

[pbgeneral]

Re: Over heating

I slide them on the shaft 1st, and then lower the top housing down while turning the shaft, a little lube will help it slide down on the impeller. Make sure you turn the shaft in the correct direction. Also there is a key on the shaft that locks the impeller in place on the shaft, make sure that is there too.

 

[Whitney tx]

Re: Over heating

I slide them on the shaft 1st, and then lower the top housing down while turning the shaft, a little lube will help it slide down on the impeller. Make sure you turn the shaft in the correct direction. Also there is a key on the shaft that locks the impeller in place on the shaft, make sure that is there too.[/QUOTE

What is the right direction and how do you no

 

[pbgeneral]

Re: Over heating

I am pretty sure it is clock wise that you would want to turn the shaft as you lower the top of the pump housing down on the impeller. When the motor is cranked it should be the same direction the flywheel turns.

 

[Chris1956]

Re: Over heating

Clockwise is correct. Do you run that motor is saltwater? If so, check the water intake holes on the outdrive for barnacles. Pull the waterpump base and the water intake covers and clean them out. If it still overheats check the thermostats. The circulating pump belt is OK? Last resort is to check the risers and manifolds. If they are clogged the motor will overheat. When was the last time they were changed? If the boat wa used in saltwater at any time in it's life, it may be time...

Repost in the I/O forum, for additional help.

 

[Whitney tx]

Re: Over heating

Clockwise is correct. Do you run that motor is saltwater? If so, check the water intake holes on the outdrive for barnacles. Pull the waterpump base and the water intake covers and clean them out. If it still overheats check the thermostats. The circulating pump belt is OK? Last resort is to check the risers and manifolds. If they are clogged the motor will overheat. When was the last time they were changed? If the boat wa used in saltwater at any time in it's life, it may be time...

Repost in the I/O forum, for additional help.

As for as i no it has never been in salt water i changed the impeller and pump had no t stat in it and hooked to a water hose got hot at a idle again im putting in a new t stat today and going to try it again