volvo 125 cooling

[Merc_115]

i feel dumb but realized im not pumping water, the rad thing in front is full of green antifreeze, no circulation out exhaust, please help? muffs on and no circulation and antifreeze still in exchanger or whatever on top of motor, maybe a closed loop deal? clearly not circulating out manifold and exhaust, please help 125/270 1983

 

[sqbtr]

Re: volvo 125 cooling

It is a closed system

How old is the impeller, and what is the conditition of the water neck at the top of the intermediate section of the drive?

 

[Merc_115]

Re: volvo 125 cooling

it all was supposed to be replaced, looks fine, and i hooked hose to inlet hose in engine and it pumps water, just doesnt seem to when muffs hooked to outdrive, hoses on outdrive look new and tight

 

[sqbtr]

Re: volvo 125 cooling

Plug the hole in the bottom of the drive. Double check the water neck it may look OK but be corroded from the inside out

 

[Merc_115]

Re: volvo 125 cooling

did that as well, taped it, my muffs only have water on 1 side, im thinking not enough, cause took hose kloose on inlet side in motor comp, it pumps water out exhaust and it filled up the screen reservoir thing in front of engine

 

[Merc_115]

Re: volvo 125 cooling

have a friend here now he thinks we put it in water it will pump, but how am i to know when cant see exhaust, i guess just watch guage?

 

[sqbtr]

Re: volvo 125 cooling

Maybe it's plugged. run water from eng to drive to make sure it's clear

 

[Merc_115]

Re: volvo 125 cooling

we did and water poured out drive, seems wierd i know, only conclusion i have is muffs not enough, what temp should be normal 180? or when should i shut it down at what temp,. we gonna go put it on the water, also the other cap out front is filles with antifreeze, so im assuming it closed system as well as raw?

 

[sqbtr]

Re: volvo 125 cooling

The raw water cools the heat exchanger and the exhaust, These engines run a little hotter than most marine engines I wouldn't start to worry till it goes over 190, 170-180 is normal

 

[Merc_115]

Re: volvo 125 cooling

going to lake to test it now...

 

[stenny]

I am having same issue with my boat

 

[jerryjerry05]

Stenny, you should start another post.
Include stuff like what your working on and what you've done?
Year, model etc.

 

[dennis461]

I got tired of muff experiments years ago.
Put the outdrive in a large plastic bin which can keep water up to the cavitation plate.
Put a quart of water into the strainer and close the lid.
This helps prime the pump.
Start the engine.

If your system is good or excellent, this will work.
If you have a problem somewhere, this will not work and you are not ready for the lake/river/ocean.