Paging Dhadley and Pannet

[Neil]

Dhadley,<br /><br />I thought I would post separately regarding my Evinrude.<br /><br />I recently changed my water pump about 5 hours ago and I am not happy with it. Doing installation I crushed the new gasket but used sealer and it looked OK. Water was stronger at the tell tale but not gushing. A separate discussion on water pressure we joined in on suggested it is low pressure system.<br /><br />The mechs who rebuilt my engine said thay had altered the pipes in the head to improve cooling which meant that the outlet from the tell tail would be reduced. I couldn't really understand what they said.<br /><br />Last night I noticed the outlet was barely dripping, even when I revved the engine. When I disconnected one of the piped into the outlet I was just getting air.<br /><br />When I run the engine I get pressurised water being forced out beteen the lower unit and shaft face where the bolts are. Is this normal? I am thinking that maybe I am losing pressure at the pump itself??<br /><br />No real problem to drop the LU again but I need to know what I am looking for and also to understand the workings of the cooling system more.<br /><br />When the engine was running the cyclinders wre not overly hot and the water temp from the outlet was OK too.<br /><br />Pannet, your engine is an 1990? How does your outlet compare?<br /><br />For others, my engine is a 1989 Evinrude VRO (disconnected) 140. I would appreciate comparisons.<br /><br />Thanks<br /><br />NG

 

[Pannet]

Re: Paging Dhadley and Pannet

Dear NGRIFF1,<br /><br />I have a continuous stream of water coming from the water pump indicator tube. I also have a water pressure guage on my boat. It read 5 psi when idle at 600 rpm and 10-15 psi when running from 1,000-5,500 rpm. I changed the impeller, gasket, o-ring and seal 8 months ago because my motor was left unused for many years before I bought it.<br /><br />I think you may have leakage of the water pump housing / grommet so you have water coming around LU and less water coming from the indicator hose.<br /><br />You also mentioned that the mechanics altered the water hoses. The water hoses on my motor are standard and I never have an over heat problem caused by the cooling system even in a hot summer ( except when the weed obstructed the water inlet window ). I think you should use the original setting.<br /><br />The flow of water in the pee hose also work as a venturi pump to pump the water out off the lower motor cover in case the water does get inside otherwise you may have a flood inside the cover.

 

[Neil]

Re: Paging Dhadley and Pannet

It seems like a pressure guage is a good idea. I have no idea where to place though. I have looked at various posts and even a schematic from schematic. I don't really wish to drill into the block so I must find where n the pipework to tee into. If I simply go on the taill pipe I think the pressure there is too low.<br /><br />When the mechs altered the pipework they said they diverted the flow in some way to imprive cooling.<br /><br />Looks like I may have to drop my LU to check. Another post I read suggested the exhaust gasket just below to power head.<br /><br />Thanks

 

[Dhadley]

Re: Paging Dhadley and Pannet

They probably unhooked the throttle control water valve. Thats OK as long as they did it correctly. I prefer the set up on the newer V4 loopers like the 1994. <br /><br />You are correct about the pressure showing low if your gauge taps into the overboard line. On the loopers there is a threaded hole on the starboard side of the adaptor plate. Your water pressure gauge hose goes there. <br /><br />A gauge is a good idea otherwise we are only guessing at water pressure.<br /><br />Thanks for the updates!

 

[Neil]

Re: Paging Dhadley and Pannet

Dhadley,<br /><br />Is it mormal to have water spraying out of the LU?<br /><br />What about the exhaust gasket? I had a mother of a job getting that to stay on as I was refitting. <br /><br />And last silly question please, where is the adapter plate.<br /><br />Thanks<br /><br />NG

 

[Dhadley]

Re: Paging Dhadley and Pannet

Yes it is normal to have some water coming out where the lower unit amd the mid section meet. To say its too much and is a problem is difficult to say. Its easy enough to drop the lower and check the pump. Especially the grommet where the tube goes in the pump housing.<br /><br />The adaptor plate is what the powerhead sits on. Look for a small plug on the starboard side. If I remember correctly, it takes an allen wrench to remove the plug.<br /><br />Good luck!