overheating

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   Tip, putting a garden hose into the RWP will help locate blockage downstream but since the water coming in from the hose is under pressure, it wont tell how good a job the impeller is doing. So you may have aproblem as outlined above or another problem upstream from the RWP like an airleak(suction). I eventually put a 0-15psi gauge directly on my engine in the water jacket which gives me a quick check each time I fire it up to see if I've got cooling water pressure to the enigne.

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great78 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: October-04-2005 Location: United States Status: Offline Points: 103	Post Options Post Reply Quote great78 Report Post Thanks(0) Quote Reply Topic: overheating Posted: July-06-2006 at 12:30pm
	Tip, putting a garden hose into the RWP will help locate blockage downstream but since the water coming in from the hose is under pressure, it wont tell how good a job the impeller is doing. So you may have aproblem as outlined above or another problem upstream from the RWP like an airleak(suction). I eventually put a 0-15psi gauge directly on my engine in the water jacket which gives me a quick check each time I fire it up to see if I've got cooling water pressure to the enigne.
	Missin' this 78SN Lovin' this 96

David F Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member Joined: June-11-2004 Location: United States Status: Offline Points: 1770	Post Options Post Reply Quote David F Report Post Thanks(0) Quote Reply Posted: July-03-2006 at 11:50am
	Set screw pointing away from block on Reverse rotation engines. If Mayberry was able to remove the cam screw, then odds are good that he has it installed correctly. But, is the cam now just loose inside the pump?

79nautique Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872	Post Options Post Reply Quote 79nautique Report Post Thanks(0) Quote Reply Posted: July-02-2006 at 11:03pm
	the raw water pump can be mounted wrong very easily, the circulation pump can't. Depending wheather the set screw towards the block or away from the block determinds which direction the water is pumped inside of the housing so that it can be used on a right hand or left and rotating engine. So suff a garden hose in to the hose end connect to the pick up, disconnect the hose from the RWP at the t-stat housing and crank the motor if water comes out of the hose then it's mounted correctly if it doesn't then you have it on upside down or a 180 degrees from where it should be, then again if the set screw is facing towards the engine odds are it's on wrong, if my memory is right and it hasn't been lately.

p/allen Members Profile Send Private Message Find Members Posts Add to Buddy List Gold Member Joined: March-14-2006 Location: Dixon Illinois Status: Offline Points: 942	Post Options Post Reply Quote p/allen Report Post Thanks(0) Quote Reply Posted: July-02-2006 at 9:09pm
	I dont understand what you mean by puting the pump upsidedown. But is it possible to hook the hoses up backwards so that the pump is working against itself ? Just trying to understand. Pat
	Pat My 72 Skier Rock River Dixon,ILL.

The Dude Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Platinum Member Joined: October-19-2004 Location: Houston Status: Offline Points: 1334	Post Options Post Reply Quote The Dude Report Post Thanks(0) Quote Reply Posted: July-02-2006 at 10:03am
	It seems like every time I pull my impeller I can't remember which way to re-install the pump. I'm betting with 79 that your pump is upside down...good news is that if that's it, it's an easy fix!
	Mullet Free since 93 95 Sport

The Dude Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Platinum Member Joined: October-19-2004 Location: Houston Status: Offline Points: 1334	Post Options Post Reply Quote The Dude Report Post Thanks(0) Quote Reply Posted: July-02-2006 at 10:01am
	It seems like every time I pull the water pump on mine, I can't remember which way to re-install it... I'm betting with 79 that the water pump is installed upside down...
	Mullet Free since 93 95 Sport

79nautique Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872	Post Options Post Reply Quote 79nautique Report Post Thanks(0) Quote Reply Posted: July-02-2006 at 1:32am
	removing the set screw does nothing, it holds a section of the pump in place and no water should come out of it, did you install the pump backwards? most likely...

mayberry Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: June-12-2006 Location: United States Status: Offline Points: 4	Post Options Post Reply Quote mayberry Report Post Thanks(0) Quote Reply Posted: July-01-2006 at 11:59pm
	Need some help. 1994 Sport Nautique. Temp gauge showed overheating. Replaced the impeller and the thermostat, check all the hoses and found nothing. Put it back in the water and it is still overheating. I thought that the impeller sucked the water from the river by itself, but when I put my water hose on the bottom of the boat and remove the set screw on the impeller housing, no water. I remove the hose that feeds the impeller, put the water hose there, and turn the faucet on, and water shoots out, but I took the plug out of the water pump and no water comes out. I pulled the water pump off, found nothing and all the teeth are still good. I still don't think its the water pump because it wasn't leaking and the pully didn't squeal and moves smooth (no bearing shot). I'm lost. Any ideas???

overheating

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