cooling ? on XR6 150 hp

[frwhlr38]

ok guys i just bout a boat its a 92 With XR6 motor on it 150 hp, i took it to lake ran wonderful all of a sudden no water was coming from telltail hole at an idel it will come out but when you rev it up it wont i changed the water pump no change,the warning buzzer is on all the time, someone told me to check the pressure relief valve but dont know where its located at any help would be much appreciated MANY THANKS

 

[j_martin]

Re: cooling ? on XR6 150 hp

1. You say the warning buzzer is on all the time. If it's on steady when the engine is cold, something's wrong with the sender or the alarm circuit. It could even be the oil alert module. If it's beeping, it's the oil alert warning.

2. A water pressure gauge would be very helpful. If there's very low or no pressure at idle, it usually means the poppit valve is faulty.

The Poppit is on the starboard side, just above the adapter plate.

Get a maintainance manual. It's priceless when yer working on the motor.

hope it helps
John

 

[frwhlr38]

Re: cooling ? on XR6 150 hp

ok found the popit valve it was a little dirty cleaned it all up but still no water outa the tell tale at higher rpm itpees just fine at idle to about 1/4 throttle then just stops it is my understanding that it will only come out when thermostat is open is this true or should it telltale all the time i found the problum with the alarm and fixed it MANY THANKS

 

[j_martin]

Re: cooling ? on XR6 150 hp

All the water out of the telltale has gone through the thermostat. If it idles below 140 degrees with just the open bypass passages, then there won't be any.

Fast idle it and check the temp of the telltale. It should be about 140 degrees, which is uncomfortably warm. If it's too hot, you may need thermostats.

Also, you should be able to lay your hand on each head for a second or so. If one is too hot or cold, you may have a problem.

Don't remove the thermostats as some suggest. You could cold-seize the engine.

hope it helps
John