Re: Model 4371 Evinrude Sportwin 1941 3.3 hp

[PM T2]

I’ve had a couple of examples of this model Sportwin. They don’t pump a lot of water, a mist or drip is about all you will see back there. More or less a damp spit.

They do not wind out very fast, although rated for 4000 RPM. I had a 4371 with a weedless lower unit, and I’d say it was rather unimpressive as far as speed was concerned. It was a quiet runner, and started easily once it was tuned up, but yes the mixer setting doesn’t have much range, and that poppet cover gasket always seeped until I used silicone on it.

When received, the motor would start with some coaxing, but not run very well…..or strong…. when I disassembled it, it was discovered that one piston had been installed with the deflector facing the wrong way. Great, there’s the problem…. except installing the piston correctly did not seem to provide the boost in performance that I was expecting….. I then cleaned out the muffler box, there was a lot of carbon-based crud built up in there, but I think all I accomplished with that job was to make the motor lighter…..Yes, metal impeller, never wears out unless…. ummm. I forget how….

Good luck with it. Hope this helps.

Best,
PM T2

He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...