Calling all Merc Mechanics

If it were a thermostat problem, the water would be coming out cold because none would be circulating through the engine block and picking up heat. If the water is coming out hot, it is a insufficient flow problem. Check your water pump(s).
 
If it were a thermostat problem, the water would be coming out cold because none would be circulating through the engine block and picking up heat. If the water is coming out hot, it is a insufficient flow problem. Check your water pump(s).
 
76GMC1500 said:
If it were a thermostat problem, the water would be coming out cold because none would be circulating through the engine block and picking up heat.  If the water is coming out hot, it is a insufficient flow problem.  Check your water pump(s).
Click to expand...


???
???
::)

Ok the water goes threw the motor first before it comes out the pisser lol
 
76GMC1500 said:
If it were a thermostat problem, the water would be coming out cold because none would be circulating through the engine block and picking up heat.  If the water is coming out hot, it is a insufficient flow problem.  Check your water pump(s).
Click to expand...


???
???
::)

Ok the water goes threw the motor first before it comes out the pisser lol
 
I did notice two things running the motor at around 2K rpm, one, its loud as H&LL!!!!! (glad the little old lady next door is deaf), the other was that the stream was not steady.  I bet it needs an impeller.
 
I did notice two things running the motor at around 2K rpm, one, its loud as H&LL!!!!! (glad the little old lady next door is deaf), the other was that the stream was not steady.  I bet it needs an impeller.
 
My Merc. doesnt pee steady that I noticed. Was told thats normal for Mercs. When I bought mine. Found alot of newspaper in te motore where mice were living. :-/
 
My Merc. doesnt pee steady that I noticed. Was told thats normal for Mercs. When I bought mine. Found alot of newspaper in te motore where mice were living. :-/
 
My 150 MERC didn't spray a steady stream either.

This may be a stupid question, but are you sure it is the overheat turning the horn on? Try unhooking the overheat sensors one at a time to see if it is actually the overheat sensors doing it. There is also a chance that parts of your old t-stats are obstructing flow somewhere in there fropm the looks of what you removed. Try running it with the t-stat covers off fopr just a few seconds and make sure water is flowing up to that point with a good stream.
 
My 150 MERC didn't spray a steady stream either.

This may be a stupid question, but are you sure it is the overheat turning the horn on? Try unhooking the overheat sensors one at a time to see if it is actually the overheat sensors doing it. There is also a chance that parts of your old t-stats are obstructing flow somewhere in there fropm the looks of what you removed. Try running it with the t-stat covers off fopr just a few seconds and make sure water is flowing up to that point with a good stream.
 
Hmmm, maybe a bad sender? Have you put your hand on the heads while she's running? Maybe she's not really hot afterall? I do know that Mercs don;t pee till the stats open, then they pee different as the stats open and close, hence the reason not consistent as noted above. Your stats have been hollowed out, so that shouldn't be the case.

Just trying to keep the flow of ideas going.

Airslot
 
Hmmm, maybe a bad sender? Have you put your hand on the heads while she's running? Maybe she's not really hot afterall? I do know that Mercs don;t pee till the stats open, then they pee different as the stats open and close, hence the reason not consistent as noted above. Your stats have been hollowed out, so that shouldn't be the case.

Just trying to keep the flow of ideas going.

Airslot
 
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