thermostat in the wrong place

[huntingdeer]

89 mercruser 305


Ok so i have figured out someone i think put the thermostat in the wrong place.I found it in the top housing? is it suppose to be against the block and the housing? why i ask is cause the motor always stays very cool.it never has got hot.

 

[alldodge]

Re: thermostat in the wrong place

89 mercruser 305


Ok so i have figured out someone i think put the thermostat in the wrong place.I found it in the top housing? is it suppose to be against the block and the housing? why i ask is cause the motor always stays very cool.it never has got hot.

Never seen a thermostat directly against the block, they are usualy against the intake manifold. Do you have a oic?

 

[huntingdeer]

Re: thermostat in the wrong place

Never seen a thermostat directly against the block, they are usualy against the intake manifold. Do you have a oic?

that is what i mint sorry.I can get one but it will be tonight.So it should not be in the top of the housing but the bottom aginst the intake.

 

[alldodge]

Re: thermostat in the wrong place

Between 1988 and 1995 there was three different designs. Only one design had the thermostat directly against the intake manifold. I need a picture of your housing or go to Mercury Mercruiser engines and parts and find your housing.

 

[thumpar]

Re: thermostat in the wrong place

Mine is in the housing with a spacer between the intake in the housing. If you look at the housing passages you can tell if it is right or not. The water should only flow into the the engine side once the thermostat opens otherwise almost all of it will go out the exhaust.

 

[huntingdeer]

Re: thermostat in the wrong place

Between 1988 and 1995 there was three different designs. Only one design had the thermostat directly against the intake manifold. I need a picture of your housing or go to Mercury Mercruiser engines and parts and find your housing.

i put the thermostat where i thought it needed to be in the pic.It was in the top.with it in the top it floats and nothing holds it down.

 

[alldodge]

Re: thermostat in the wrong place

View attachment 214911

i put the thermostat where i thought it needed to be in the pic.It was in the top.with it in the top it floats and nothing holds it down.

You installed yours in the right place. You have the one Merc calls Design I. You need to have the sleeve 23-47508T and internal gasket 27-47510 installed to hold it down if it is not there. Here is the view
http://www.mercruiserparts.com/Show...r=210&bdesc=STANDARD+COOLING+SYSTEM(DESIGN+I)

 

[huntingdeer]

Re: thermostat in the wrong place

are you sure it shows it in the center piece not on the intake.smh can i buy one thing this is not rigged!! lol I do know all it had was just the seals no sleeve or ect.

 

[huntingdeer]

Re: thermostat in the wrong place

where you see the thermostat its on the intake in my pic but link shows different.

 

[hall832]

Re: thermostat in the wrong place

in the diagram you were given a link to it shows where it goes. it goes on top of the thermostat housing with a sleeve.

 

[huntingdeer]

Re: thermostat in the wrong place

one last dumb question with the seal and the sleeve on top of it in the top chanber how would the water escape? this is the sleeve i found. Mercury Quicksilver Thermostat Sleeve Part 23 47508T | eBay im confused or......? lol

 

[alldodge]

Re: thermostat in the wrong place

one last dumb question with the seal and the sleeve on top of it in the top chanber how would the water escape? this is the sleeve i found. Mercury Quicksilver Thermostat Sleeve Part 23 47508T | eBay im confused or......? lol

It appears to be the right part, but after looking again at your pic in post 6 it appears the sleeve is there. The sleeve appears to be put in upside down from the top.

Once the block is filled up there is always a small hole somewhere , sometimes in the stat it self which allows small amounts of water to pass.