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little_ponderosa

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I am back. Got the shaft probl

I am back. Got the shaft problem solved. However it just will not pee from the top. Pulled water pump three times to check and it still will not pee. Sits and runs perfectly just will not pee.
It also wants to stall out and engine die when you go from netural to forward. all ideas appreciated.
Do you think that it could be a froze close thermstat?????
 
"Yes and No on the t-stat.

"Yes and No on the t-stat.

I am far from an expert but here are my thoughts. I own a 1975 9.9Hp Evinrude which is the same motor as yours except for the carburetor (I am assuming you are the guy with the 1976 15Hp). There was a question many moons ago about why this motor would take about 20 seconds before water would spray out the exhaust hole. One of the answers was that it was because this model had the t-stat located at the bottom of the powerhead, which meant that the motor had to come to temperature to open the t-stat, before you would see water out the exhaust hole. I cannot tell you if this is correct, but my motor does take about 15-20 seconds before I see water spraying out the back. If this is the case, I would say, yes a closed t-stat will prevent the visible view of water out the exhaust.

My logic then kicks in and says, but if the t-stat is closed continuously (like a t-stat that has failed closed) the engine should eventually overheat. I eventually get a spray and my motor seems to run very well.

So, if your motor is not overheating, then my gut feeling is that it is not a closed t-stat. I am sure others will add to or debunk my thoughts, but I thought I would add what I could. Good luck."
 
"Try running it without the th

"Try running it without the thermostat (just as a test) and see if water comes out then. If not, check to see if the telltale (pee hole) is blocked, try carefully poking a piece of wire up there.

The telltale is not the primary water outlet, so run on muffs (this may be difficult to impossible) to check if water is exiting through the exhaust. If you can't use muffs you could remove the water pump and shove a hose up the water pick up tube to see if things are circulating out the exhaust. Get back to us with the results and this forum will no doubt take it from there."
 
"I miss some info about model

"I miss some info about model and size of engine.
However NEVER run without thermostat. The thermostat is located after the 'pee' hole and removing the thermostat will reduce the pressure at the 'pee' hole.
Drop the muffs, put the lower unit in a barrel with water level above pump!"
 
"Up date. I run this engine w

"Up date. I run this engine which is a 15hp johnson in a barrel and also on the lake and still no water out of pee hole. Engine seems to run good perhaps a little on the hot side, unable to touch engine for longer than a couple of seconds.
I have blowed water through the pee hole and also air it does not seem to have a blockage at all. I am not sure the exact location of the theremstate otherwise I would have pulled it and look at it or even run a test on it.
all posting is appreciated.
I do believe I need a electric start this engine is too hard to start for a man in the 70s. so i am back to my 9.5. better engine"
 
"A bit closer, but year/model

"A bit closer, but year/model number is needed to get the exact location and type of thermostat.
However if the 'pee' hole is not blocked, something must come out: Water, steam, exhaust?
If Exhaust, gaskets are blown. Did You change the impeller or just 'inspect' -change it!
If Thermostat is stuck open there might not ne enough pressure to get water out of the 'pee' hole.
Check the thermostat.
Give a model number or year and I'll put a pick where it is located."
 
"Just so that we are on the sa

"Just so that we are on the same page. Your motor does not have a tell tale. The indication of water flow is a spray out the exhaust relief hole in the back, just under the cowel pan. The thermostat is accessed by removing the water cover jacket that is bolted on top of the cylinder head. The thermostat is in this water cover jacket at the bottom.

I cannot remember if you can remove the water cover jacket without removing the cylinder head (the bottom bolts may be difficult to reach) but if you can, the inspection would not be difficult. I would get a new water jacket gasket if I was going to do that and a new power head gasket if I was going to take off the cylinder head. If you end up taking off the cylinder head, be sure to torque it back down to spec. when you put it back on.

That's a nice motor you have there."
 
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