overheating h20

[johnzonh]

hi guys,

have a merc 888 ford 302 i/o in a 75 glastron. a few things...

big problem is that the water is getting really hot...what are some of the things other than the obvious water pump i should be looking for. the engine otherwise runs fine..outside of a now dead battery with rusted away terminals ...ahhh the joys of inheriting a used boat.

also....it idles fine.... but when in gear it died several times. wondering if it is as simple as upping the idle screw or something else. any thoughts?

john

 

[Don S]

Re: overheating h20

other than the obvious water pump

Assuming you are calling the pump mounted on the engine with the v belt turning it, the water pump, that probably is NOT your problem.
There is a raw water pump in the outdrive that is the first thing to check.

If the engine dies when you put it into gear, you probably need a new lower shift cable

What you really need is an OEM service manual so you can get some idea what you are working with.

 

[Don S]

Re: overheating h20

Here is the link to the OEM service manual you can download if you have hi-speed internet. It's over 1 GB in size and may take hours to open.

http://www-alt.mercurymarine.com/mnetdata/SERVICE/CRUISER/Servmanl/02/cover.pdf

 

[johnzonh]

Re: overheating h20

already have it. thanks for the help though. I am looking into the lower unit section as im typing

john