water gauge temp?

[big ken]

hi i have a 78 glastron 185 inline six, just put in rebuilt motor and resealed outdrive. started up today and noticed there was no water temp gauge, i just installed one at the thermo housing. it is running at 210 plus. im thinking water pump on engine needs to be replaced. already have new on in outdrive? what is normal temps. thanks ken

 

[Fishermark]

Re: water gauge temp?

im thinking water pump on engine needs to be replaced.

Maybe... but doubtful.

First guess would be manifold / riser clogged. When you rebuilt the engine, did you carefully examine the manifold for corrosion, etc?

There's not a lot that can go wrong with the engine mounted circulating pump other than leak. Again, when you rebuilt the engine and had the circulating pump off, did you look at it? Were the vanes worn off? That's about the only thing that I can think of that would fail on the pump - again, other than leaking.

 

[big ken]

Re: water gauge temp?

Maybe... but doubtful.

First guess would be manifold / riser clogged. When you rebuilt the engine, did you carefully examine the manifold for corrosion, etc?

There's not a lot that can go wrong with the engine mounted circulating pump other than leak. Again, when you rebuilt the engine and had the circulating pump off, did you look at it? Were the vanes worn off? That's about the only thing that I can think of that would fail on the pump - again, other than leaking.

i bought the motor used. i could see it had brand new valves and all new pan gaskets ets but it did have old water pump on it, as far as manifold the used moror had an aluminum with only 2/12 in exhaust elbow and was too close and only an inch away from ehhaust and i couldnt fifuer out how to connect them, so i used my orginal one which han plenty of rust in it so i picked, brushed,run water thru it to clean out what i could, and also put in new upper and lower therm hsn and thermastate. i dont believed the old motor ever over heated with the old exhaust but never had a gauge so im not sure. thanks ken

 

[Fishermark]

Re: water gauge temp?

i used my orginal one which han plenty of rust in it so i picked, brushed,run water thru it to clean out what i could,

If it is plugged, all the picking, etc will not solve the problem. I don't know if that is the ONLY problem you have, but you did not help matters any by using the old manifold and riser. In fact, the picking, etc will make it more likely to fail in the (maybe) near future - allowing water into the cylinders and creating more problems for you.

The engine circulating pump is easy to remove and check... but I do not believe you will find it to be the problem.

 

[Silvertip]

Re: water gauge temp?

210 is way too hot and since this is not a closed system, only 2 degrees away from boiling. Are you sure the correct sender is being used for your gauge. You could temporarily install a real cheap mechanical gauge to make sure the engine is indeed overheating.

 

[big ken]

Re: water gauge temp?

210 is way too hot and since this is not a closed system, only 2 degrees away from boiling. Are you sure the correct sender is being used for your gauge. You could temporarily install a real cheap mechanical gauge to make sure the engine is indeed overheating.

this boat was not equipped with a gauge so i put in a nice procomp mech one . i will start with a water pump. thanks ken ps some one told me to try taking out thermostat?

 

[mthieme]

Re: water gauge temp?

160-170 degrees should be normal.
It would not be abnormal for the manifold to collect rust an clog.
I assume you had to transfer this over - did you clean it out?
One quick way to check is I can put my hand on mine without getting blisters.
What about the impeller in the outdrive?
Did you replace this when resealing?

 

[big ken]

Re: water gauge temp?

160-170 degrees should be normal.
It would not be abnormal for the manifold to collect rust an clog.
I assume you had to transfer this over - did you clean it out?
One quick way to check is I can put my hand on mine without getting blisters.
What about the impeller in the outdrive?
Did you replace this when resealing?

yea i did take manilold off old motor and cleaned it the best i could. surpisingly the motor it came off of run great until he didnt winterize it and block cracked, but im not so sure if it wasnt over heating because ther is no water gauge on boat[could have been and he just didnt know it] im putting on a new engine water pump[the one i took out didnt look too bad] already put in complete outdrive warer pump. when engine was running i pulled off hose from transom and water was coming out of that so i know that pump is working and also i noticed water gushing out of exhaust boot so i tightned that up. so i figured that watewr must have been flowing out of riser and also no signs of water in cylinders. the next test is going to be with ear muffs instead of recirculating the same water in a barrell and also took out thermostat. you being from pasadena im sure you go to the magothy river, that about the only place i trule like to go thanks ken

 

[Fishermark]

Re: water gauge temp?

Just taking out the thermostat is a bad idea. Unlike a car, the thermostat in a boat serves more purposes that just opening when the engine gets to a certain operating temperature. It also helps direct the flow of water to the various areas. By simply removing it, you are affecting how the water flows. It will take the path of least resistance and cause problems. Your best course of action is to find the cause of the overheat and fix it, rather than trying to "bandaid" it.

 

[big ken]

Re: water gauge temp?

Just taking out the thermostat is a bad idea. Unlike a car, the thermostat in a boat serves more purposes that just opening when the engine gets to a certain operating temperature. It also helps direct the flow of water to the various areas. By simply removing it, you are affecting how the water flows. It will take the path of least resistance and cause problems. Your best course of action is to find the cause of the overheat and fix it, rather than trying to "bandaid" it.

i was thinking that without it the engine wouldnt come up to temp and if that were the case i figured ok it was the thermostat. but i just got done testing it in hot water on the stove[150 deg] and it opened so i guess that is not the problem. any way to test the manifold? i do have a nice aluminum one i bought with motor but it didnt match up with my existing exhaust at transom[only about an inch away but it was offset about an in as well. also the exhaust is only 2 1/2 in round. im trying to get some pics so maybe one of you guys might know what it is. it has a small hose going from front to back and a 3/4 in hose going front to bask to. thanks ken