engine temperature

[almal]

I have a 1989 Carver Marinner with twin 350ci. 260 horse. both engines will not come up to operating temp 140. I have replaced both thermostats, the engines still run cool. when measured with a laser temp gauge they read 105.<br />The thermostat housing remaine cold at all times.<br />the thermostats are in correctly.Any ideas?<br /><br /> thank's malvo

 

[SpinnerBait_Nut]

Re: engine temperature

Welcome to iboats malvo. Let's get this to the I/O forum for answers.

 

[Boatist]

Re: engine temperature

Welcome to Iboats.<br />What brand engines do you have, Merc, Vovo, Omc?<br />At what point are you reading 105 degrees. Block, intake manifold, Heads. What do your temperature guages read. Themostat houseing on my motor is also cool but that is because the Sea water from the outdive runs accrossed houseing on it way to cool the exhaust manifold. Heads and Block run about 160 degrees.

 

[almal]

Re: engine temperature

THE ENGINES ARE MERCRUISER'S, NEITHER ENGINE REGISTERS TEMPERATURE.THE SENDERS ARE IN THE THERMOSTAT HOUSING WHERE THEY ARE LOCATED IS LIKE SEA WATER TEMPERATURE. THE LASER READINGS WERE TAKEN ON THE SIDE OF THE BLOCK AS WELL AS OIL PAN.THE EXAUST MANIFOLDS ARE ALSO COLD.<br /><br /> THANK'S FOR THE REPLY, MALVO

 

[Bondo]

Re: engine temperature

Well,..........<br /><br />I find 3 Different designs of Your T-stat Housing,........<br />All the pieces Have to be Exactly In Place,.......<br /><br />I'd be Relooking at Them to see Why it's by-passing All it's Water..........<br /><br />A Miss placed O-ring,... Or the Collar misadjusted,..???.... Even the T-stat Upside Down,.??<br /><br />Btw,.... Turn the Cap-Lock back Off....... Good Luck.......

 

[almal]

Re: engine temperature

I have a design 2 thermostat housing. I called and got rebuild kits from a Carver dealer the kits come with nboth o ring and round gasket, but do not show o ring on blowup of housing. The parts man says to use eather or, I am not sure of that.<br /> any ideas malvo

 

[almal]

Re: engine temperature

Found the problem. The thermostst does not go at the bottom of the housing it goes at a halfway up point in the housing.<br /> Thankyou all for your replies, malvo