Evinrude Zephyr help needed.

[jmendoza]

Hi, I beleive I have a 4425 model Zephyr( numbers on plate are not too legible) but it has 1949 production date ink stamped on the tank bottom, and has weedless lower unit, teal blue tank.

Anyway, it runs fine, but after about ten minutes it will start to slow down on pumping water and begins to get hot. Does this engine have a rubber bladed water pump impeller? I was once told it was metal, not rubber. I don't have any literature or manuals and since you guys do could you confirm what type of impeller it has, and where it is located. I cannot seem to get the lower unit off either, was wondering what all holds it on

Thanks, Jay

 

[Daviet]

Re: Evinrude Zephyr help needed.

I will have to dig out the old manals and see if I can find some info for you, will post back, probably tomorrow.

 

[jmendoza]

Re: Evinrude Zephyr help needed.

Thanks for responding, I'll check the forum for your reply and findings,
Jay

 

[F_R]

Re: Evinrude Zephyr help needed.

Pretty sure that motor has a centrifugal water pump, probably a two-stage one. That was an era when some of the impellers were rubber and some metal. Either way, it is centrifugal and they won't cool properly running in a barrel. Is that what you are doing?

 

[Daviet]

Re: Evinrude Zephyr help needed.

By my manual, a model 4425 is a 1949 Evinrude Sportsman,1 1/2 hp.
The lower unit looks like it is held on by four screws that go from the top down into the lower unit.
It like there are two impellers, an upper and lower, PN 202278. Of course that PN is not a valid number anymore.

 

[jmendoza]

Re: Evinrude Zephyr help needed.

Yes, was running it in a barrel. Actually, a trash can, same thing. It pumps water fine as you can see it coming out the slits on the shaft above the water line. There is a trickle flow out of the hoses to each head, and I'm assuming it's not enough to keep it cool. Model may be 4429, and not 4425, the plate is a bit obscure. But for sure it's 1949 Zephyr 5.4 HP vertical opposed four, rotary valve intake.

Does anybody have the correct sperk plug information for this engine, and how to service the water pump? Thanks guys.

 

[Dave2507]

Re: Evinrude Zephyr help needed.

It would be a 4429. I'm pretty certain they went to a rubber impeller on that one. At any rate, they will not pump well in a barrel for long, no matter which impeller they have. Gotta get it on the water to have any hope of it pumping right. Too much turbulence in a can.
As far as plugs, I run J4C Champions, unless I am doing a lot of trolling speed, then I go to a J6C.
As far as getting to the water pump, there should be a couple of screws that hold the housing together. Tilt the motor to a horizontal position, and you'll see them on the bottom. You may need an impact driver to loosen them. Once you remove them, you should be able to slide it away from the upper half of the leg and get to the pump. That's how my earlier ones come apart, and I don't believe the weedless unit was much different to get to the pump rotor and housing, although the screws may go in from the top on yours. Good luck and have fun......they run nice once you get them dialed in.

 

[Dave2507]

Re: Evinrude Zephyr help needed.

It would be a 4429. I'm pretty certain they went to a rubber impeller on that one. At any rate, they will not pump well in a barrel for long, no matter which impeller they have. Gotta get it on the water to have any hope of it pumping right. Too much turbulence in a can.
As far as plugs, I run J4C Champions, unless I am doing a lot of trolling speed, then I go to a J6C.
As far as getting to the water pump, there should be a couple of screws that hold the housing together. Tilt the motor to a horizontal position, and you'll see them on the bottom. You may need an impact driver to loosen them. Once you remove them, you should be able to slide it away from the upper half of the leg and get to the pump. That's how my earlier ones come apart, and I don't believe the weedless unit was much different to get to the pump rotor and housing. Good luck and have fun......they run nice once you get them dialed in.

 

[bktheking]

Re: Evinrude Zephyr help needed.

I've been told if you remove the prop the turbulance issues go away. 1949 was the only year they used a rubber impeller.

 

[wilde1j]

Re: Evinrude Zephyr help needed.

You can get an OEM shop manual from outboardbooks.com and not be guessing ...

 

[1946Zephyr]

Re: Evinrude Zephyr help needed.

The 49 Zephyr, I would say is one of the less common ones and would make a decent part of a collection. It's pretty much a style that is only for one year. The prior years were all pretty much the same. If it's a 360 model with a weedless l/u, that makes it unique. It would also make it the only 4 cylinder with a weedless l/u ever made.