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Somewhere around 10 years ago, I bought this 1949 Evinrude Zephyr. Many projects were put ahead of this motor, but now it’s time to get it running.
From reading other posts over the years, the two things that I’ll be needing are the impeller and the primer cups. Both parts are out of production to my knowledge.
Is there an impeller in production that can be modified to work? Is there a substitute for the primer cups or something that can be modified? I recall old friend Mumbles made his primer cups using a lathe.
I’m definitely interested in any answers you get.
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This old thread shows the cups Mumbles modified……..
https://www.aomci.org/forums/topic/evinrude-zephyr-4404-5-4-hp-4-cyl-fred/page/2/Prepare to be boarded!
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The pump impellor is Pt # 276857 and is a rather unique design 2-3/4 diaX 3/8 thick bore is ,680 and has three nubs , no key way.
While I was looking I also found the special drive shaft and prop shaft seals. These are also unique, as they are one piece molded rubber, having no metal casing. They pop into their respective bores and are held in place with a rib around the circumference.
Joe B
PS, just looked, there are a couple impellors on flea – bay
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My grandfather and I tried the primer cup replacement that Mumbles showed, and if you replace both the rubber pieces (with the same U-cups for both the plunger and check valve) and do the machining, it works perfect. My Zephyr starts first pull (Cold) with the primer modification. Once the primer is modified with the u-cups, just be careful not to over-prime.
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Have one NOS 276857 impeller Ed Elliott eddelliotta2cox.net
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Should be for Ed unless he’s changed his
eddelliott@cox.net George
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Another thought / caution on Zephers in general. The close proximity of fuel and high voltage within the close confines of the front shroud have all the makings for FIRE. Be sure that there no fuel leaks. as for the potential of a stray spark… consider using short body spark plugs… why? The original style champion plugs had slightly shorter bodies than the modern equivalents. The longer bodies put the terminals closer to the aluminum front shroud.,, potential for a stray spark. Short body plugs of the correct heat range are available from both Champion and NGK. I like the NGK – BM7A… they seem to have the right heat range and also have screw-on terminal nuts.
Joe B
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