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Any Evinrude Zephyr experts out there?
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<blockquote data-quote="Pappy" data-source="post: 391306" data-attributes="member: 3278"><p>You are the owner of the World's smallest production 4-cylinder outboard! You should have a separate model number. Check it again. I see in the model/year guide that the "4378" part of it indicates your engine is a 1945-46. Later ones came with the recoil starter. </p><p>It is an opposed 4-cylinder, produces 5.4hp and has one of the most complicated (for it's day) carburetors you can get your hands on. The ignition systems are pretty much bulletproof and it would surprise me if you do not have spark to at least some cylinders. Do not pitch the spark plugs. That engine should be run on 16:1 pre-mix. The outer portion of the cylinder heads have no cooling jacket around them so don't get your hands on them while running. There is or at least used to be Zephry races held by the AOMCI bunch. Apparently those little engines take well to modifications. </p><p>They are actually pretty good running engines once you get them back in service. I have two or three of them.</p></blockquote><p></p>
[QUOTE="Pappy, post: 391306, member: 3278"] You are the owner of the World's smallest production 4-cylinder outboard! You should have a separate model number. Check it again. I see in the model/year guide that the "4378" part of it indicates your engine is a 1945-46. Later ones came with the recoil starter. It is an opposed 4-cylinder, produces 5.4hp and has one of the most complicated (for it's day) carburetors you can get your hands on. The ignition systems are pretty much bulletproof and it would surprise me if you do not have spark to at least some cylinders. Do not pitch the spark plugs. That engine should be run on 16:1 pre-mix. The outer portion of the cylinder heads have no cooling jacket around them so don't get your hands on them while running. There is or at least used to be Zephry races held by the AOMCI bunch. Apparently those little engines take well to modifications. They are actually pretty good running engines once you get them back in service. I have two or three of them. [/QUOTE]
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