Overheating starboard side of engine

[Carl]

Ferm,

I retorqued the bolts about a week after I reinstalled the head. I have not rechecked them after I ran it yesterday. I will do that soon. I looked at the water tube for as far as I could see it when I had the lower unit off. This is what I had done when the lower unit off, the t-stats and the poppet valve out, I also removed the plug on the top of the engine and plugged all the holes and filled the engine with water to see where it would come out. It came out the t-stat holes on each side and then I pulled all the plugs and water flowed really steady until the engine drained. i can recheck the tube also. I think you mean the copper tube that is part of the engine and not the plastic extension that comes with a water pump kit. When I was trimming the engine, it never came out the water to disrupt the flow, but it was interesnting as to how it affected the flow. Do you think it could be related to something between the inlet holes of the lower unit and the inlet to the water pump. Would it be worth pulling the water pump housing and seals? Another thought - there is a short hose that is attached to top part on the forward end of the lower unit - I guess it is for speed indication. My previous motor had this hole plugged. Could I be loosing water out that open ended tube that should be going to the engine?



Thanks


Carl

[spareparts]

put a water pressure gauge on it and report back. When you replaced the water pump, what brand did you use? Did your replace just the impeller or did you replace the housing as well

[Carl]

I used the Mercury OEM pump kit replacement included Impeller, gaskets, upper housing, small plastic water tube etc. For the pressure gage, does this get attached at the hole at the top of the engine that has a threaded plug in it?

Thanks

Carl

[Carl]

I think I may have found my issue with the water flow on this engine. I was running at 3K rpm and inspecting the engine for any source of water leakage where it shouldn't be. I found water spurting out at the exhaust plate connection - where the power head meets the exhaust tower. It looks like a piece of the gasket is compromised. The higher the rpm, the more water spurts out this spot. Does this sound like the culprit? How hard is to to replace this gasket? I'm assuming the power head has to be lifted?? Annything else I should replace if I separate the powerhead?

Thanks

Carl

[spareparts]

I think you just found it, the exhaust pressure will get into the cooling passages and prevent water from entering(exhaust pressure greater than water pressure), you will have to pull the power head. The power head bolts(studs) can be a pain