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Honda bf 45 hp small pee

C

CamperBoat

New member
1. I replaced the water pump last year following a video. I didn't get much out of the pee tube just a dribble. 2. So I ordered a new thermostat. And when that was apart dumped water through it with the lower unit removed and it came out both the pump tube and the exhaust point. Flow was good both ways. 3. Made sure nothing in pee tube removed the fitting in the block and nothing there. 4. Removed side water jacket cover and it was clean. 5. I then connect a hose to the pump tube and had flow in ever direction with a good stream out the pee point. 6 I put it back together and put it in a 55 gallon trash can filled with water. Still just dribbling. I ran it for about an HR. No temperature light and side jacket warm but not hot. So we put the boat in the water and had no problems of over heating running 70 miles on the Erie Canal at about 3000 rpm. I replaced the pump impeller this year and looked over everything again. Still just a dribble. So I blew air in where it connects to the block and got that to come out fine in the 55 gal. Tank. The motor starts right up and runs very smooth. Doesn't overheat but just like an old man has a dribble. What did I miss? I would like to have a tail tell.
 
Hi,
You didn't say what model, year or horsepower so this is generic to most but not all.

Try running it with the tell-tale fitting removed. The water should GUSH out of the tell-tale bypass immediately upon start up.

Anything in there should be forced out unless something of a very unique shape is wedged in there EXTREMELY tight.

I think that you may still have something in there that, often times, doesn't get removed by other methods including compressed air.
This method has worked for me many times when nothing else would. My experience comes from the fact I used to be the head mechanic for a number of rental fleet locations in Southern California. Tell tale plugging was a common thorn in my side.

If this method doesn't work, then I would be taking out the pump to cylinder block water tube and inspecting the grommet it fits into.

People misinstall that water tube when doing pump work and that grommet can be torn and wadded up or deformed. That will affect the flow in various ways. If the tube end is allowed to "flop around" in a poorly fitting grommet or if it's missing entirely, the engine block can be damaged in that area.

I've seen what I believe to be erosion of the metal in that area due to a poor fitting grommet because the force of those little pumps is actually quite amazing.

Please let us know how it goes. You may discover something I've never seen and that might definitely help others tuning in here.

Good luck.
 
I removed the brass fitting that goes to the block and fired up the engine. Boy that makes a mess. Water everywhere. It was a good thing the oil dipstick was down all the way. She now pees like a young man. Thanks for the tip. I found a part of an old impeller that came out.
 
There ya go!
Glad it worked for you.
Now....
Go have some fun and stop working on outboards:)...
....for awhile anyway.
 
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