Motor running hot!?! Is the Engine Compatiblity?

[ontheprowlgary]

My engine is running hot!
Is a Mercruiser 1989 drive compatible with a 2001 motor? I was recently told that an '89 and a '01 drive have different pump pressures. I was told the '89 has a low pressure pump and the '01 has a high pressure pump, making the '89 and '01 motor not compatible. How can I fix this problem? do I need a new drive? How can I get my motor to stop running Hot???

Mercruiser 2001 260HP throttle body fuel injected
Mercruiser 1989 Apla 1 Drive

Also...
Its a Raw Water cooled engine...
It's running just under the red line on the gauge.

 

[Bt Doctur]

Re: Engine Compatiblity - Motor running hot!?!

Re: Engine Compatiblity - Motor running hot!?!

There were a lot of motors made then, any particular one ?

 

[Bondo]

Re: Engine Compatiblity - Motor running hot!?!

Re: Engine Compatiblity - Motor running hot!?!

How can I fix this problem?

Ayuh,... Adding the plastic check balls to the T-Stat housing really helped mine...

 

[Don S]

Re: Engine Compatiblity - Motor running hot!?!

Re: Engine Compatiblity - Motor running hot!?!

Do you have a closed cooling system, or a raw water cooled engine? and how hot is it running?

 

[ontheprowlgary]

Re: Engine Compatiblity - Motor running hot!?!

Re: Engine Compatiblity - Motor running hot!?!

Its a Raw Water cooled engine...
and it's running just under the red line on the gauge.

 

[ontheprowlgary]

Re: Engine Compatiblity - Motor running hot!?!

Re: Engine Compatiblity - Motor running hot!?!

What are "plastic check balls"

 

[Bt Doctur]

Re: Motor running hot!?! Is the Engine Compatiblity?

Use a laser temp gun to verify the motor is actually that hot.You should be able to keep your hand on a riser or manifold without getting burned.If you were running that hot ,you should have burned off the rubber exaust couplers.
Manifolds and risers replaced when?
Impeller replaced when?

 

[Don S]

Re: Engine Compatiblity - Motor running hot!?!

Re: Engine Compatiblity - Motor running hot!?!

Its a Raw Water cooled engine...
and it's running just under the red line on the gauge.

What's the red line on your gauge? You should be running around 170?

 

[ontheprowlgary]

Re: Motor running hot!?! Is the Engine Compatiblity?

Thank you for the advise I will get it in the water and use a temp gun on it and let you know what it reads.