4.3 thermostat

[Kewen300]

It has probably been best into the ground but can you run a motor without the thermostat installed? Advantages? Disadvantages?

 

[Scott Danforth]

Advantage: none

Disadvantages:
Improper cooling (water flow can not be regulated)
Engine does not come up to temp. This causes the following:
Poor running
Increased wear
Acid build up in oil
Condensation in oil doesnt burn off

 

[dubs283]

agree with the comprehensive list scott mentioned, would add increased fuel consumption but may not be easily noticed being its a boat, fuel economy is the last item most boat owners are concerned about.

are you have issues with the cooling system not working properly?

 

[Kewen300]

agree with the comprehensive list scott mentioned, would add increased fuel consumption but may not be easily noticed being its a boat, fuel economy is the last item most boat owners are concerned about.

are you have issues with the cooling system not working properly?

Well last year the motor that was in the boat was a running blow up. Head gasket shot and block had micro crack. The risers were too hot to keep my hand on. Fast forward to yesterday put the new(to me) motor in with same exhaust manifolds and risers and let the motor run to about 140, the risers were still too hot to touch. I had water straight piped from hose through bellow port as I took outdrive off to rebuild. So not sure if there is a clog in the system some where or if the risers are just bad or where to begin. The thermostat is new last year btw

 

[Scott Danforth]

Get new manifolds

 

[Kewen300]

Get new manifolds

Just ordered a set last night. Also with this I noticed there are 2 different wet joint gaskets one with 2 long openings and 2 pin hole type openings and one with 4 long openings. Is there a difference as far as what they do? I'd assume 1 would allow more water to go through than the other. Is that good thing or bad thing as compared to the one with the restricted flow?