Overheating at idle under load

[commonarcwelder]

1996 225 Vindicator. My problem is this. When idling in gear for say 100 yards the alarm goes off. The pressure gauge reads 12lbs. at 5500 RPM's and 2lbs. at idle under load (650-675 RPM's). It will run all day long above idle with no problems. Just bought the motor and it SUPPOSEDLY has a new impeller....The telltale has a good stream coming out of it.....Thermostat? Thanks Guy's! Also has low water pickup if that helps at all.

 

[HighTrim]

Re: Overheating at idle under load

Your problems usually indicate a t stat issue, they control the temp at idle. If you're into them though, you might as well replace the poppet valves as well, save you some time and money the next time it overheats at high speeds. I would never trust somone else when it comes to the impellor being replaced, can be very expensive if it fails,on any new motor I would replace it right away. Good luck.

 

[tashasdaddy]

Re: Overheating at idle under load

tstat, poppet valve.

 

[commonarcwelder]

Re: Overheating at idle under load

Thanks guys. I'm gonna go ahead and change the impeller, thermostats and the poppet valves.

 

[commonarcwelder]

Re: Overheating at idle under load

The poppet valve. Is this what bombardier refers to as a blowoff valve?

 

[HighTrim]

Re: Overheating at idle under load

the poppet valve is located beneath the t stat in the t stat housing, it is essentially a rubber valve that opens at high rpm, it will have a large spring against it.

 

[commonarcwelder]

Re: Overheating at idle under load

I cant find this on BRP's parts illustration.

 

[CH1968]

Re: Overheating at idle under load

I have read that some cut their poppet spring in half.

What advantages woudl this give?

Cam

 

[tashasdaddy]

Re: Overheating at idle under load

i have no idea, as i have never done it. it was engineered to run with complete spring, and never had any problem.

 

[Dhadley]

Re: Overheating at idle under load

Your motor doesn't have the poppet valves but rather the single blow-off valve.

Your readings are extremely low. Verify that the line for the pressure gauge is connected to the adaptor housing (lower starboard side). Make sure both t-stats are there and working properly.

If all you're changing is the impeller, go ahead and replace the rest of the kit. Make sure you have the high pressure pump.

 

[commonarcwelder]

Re: Overheating at idle under load

Thanks Alot Dhadley. That explains why I couldnt find them on the parts diagram or the motor. LOL....What should the pressure gauge read at idle and at WOT? Thanks Guys!

 

[Dhadley]

Re: Overheating at idle under load

Let us know where the line is reading from. If it's not reading from the adaptor housing then we'll have to get it there.

 

[commonarcwelder]

Re: Overheating at idle under load

OK....I'll do that tomorrow. Boat is in my barn. Was cleaning out my barn this afternoon after work and heard alot of hissing in the corner. Turned around and there was about 10 copperhead snakes!! Not sure what to do about them yet....Maybe I'll kill them tomorrow......Thanks DHADLEY!

 

[commonarcwelder]

Re: Overheating at idle under load

Still havent had a chance to pull the cowling off and see where its reading from. I went ahead and ordered a water pump kit though. It's a Sierra kit, part number 18-3392. Any opinions on using the aftermarket kit versus OEM?

 

[Benny1963]

Re: Overheating at idle under load

hi keith i live in denham springs la. i have a 150 v6 rude
i crossed over the 18-3392 to sierra and used it .
works great , put pump kit in fired it up and thermo started leaking.
went with full sierra thermo kits they work fine ,
bennyb

 

[commonarcwelder]

Re: Overheating at idle under load

That's good news neighbor.... Appreciate the info!