Evinrude 4hp water pumping

[Willc76]

Hi all
Firstly, apologies my first post is after some help. I will contribute in future where I can, I promise!
I have just bought an old Evinrude 4hp 2 stroke twin (BE 4BRCOB) and despite being unused for ten years and probably left with old petrol in, it started second pull. I love it already.
I have stripped the carb, all lovely and runs and idles beautifully.
I took the water pump apart, it all seems to be there and in good condition. Cleared the crud around the intakes. I know it doesn’t have a pee stream but I’m not sure I can tell if enough water is spitting out the tell tales.
I haven’t run it too long for fear of overheating. I have attached a hose to the water pipe and it all flows through the tell tales easily.
Unless anyone has a better idea, my plan was to run it and keep checking the temp of the block with one of those thermometers they point at your head to test for Covid.
does anyone know what temperature should the outside of the block run at?
Thanks in advance folks.

 

[VicS]

After being idle for so long it would be a good idea to replace the pump impeller ........... always a good idea with a "new to you" outboard anyway.

You can check for overheating by touch. It should be possible to maintain finger tip contact briefly at any point around the power head except for around the spark plugs and the exhaust manifold cover plate.

There should always be some water blown out of the backpressure relief ports. Maybe just a mist or a few drops. Any steam would indicate overheating.

There is no thermostat in this model.

(1985 btw)

 

[Willc76]

Thanks Vic that is very helpful. Sounds like I might be ok, I’ll do the new impeller then run it up again.

I did notice that it seems to have a shaft length of 17.5in which seems in between standard and long. Does it need to be deeper in the water than other outboards (ie higher up above the cav Plate?

thanks again for your help
Will