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| Replace a Zenith 63M with ???? |
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Message |
    
Russ Cluett
New member
Username: russ_cluett
Post Number: 3
Registered: 10-2006
| | Posted on Wednesday, July 30, 2008 - 07:08 am: | 
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I've seen some posts where people have replace Zenith 61 series carbs with something else. I have a Kermath Sea Jeep with no carb (at all). Sadly, this means that my Earl Barnes designed 18' boat has been resting on the trailer waiting for a carburetor, and I know it wants to get wet :-). It was supposed to have a Zenith 63M Carb Number S1351-A but I've been looking for over a year and have yet to find one. Does anyone know of a carb that could be used as a replacement? I'm also looking for an ownsers manual for a sea jeep.
Any help will be greatly appreciated.
Russ |
Richard A. Day Jr.
Senior Member
Username: richardday
Post Number: 643
Registered: 11-2003
| | Posted on Wednesday, July 30, 2008 - 11:09 am: |
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What size SAE flange does the intake have where it joins with the carburetor? Seems to me the 63M is a typical updraft marine carburetor which came in 5 sizes. 1-1/4". 1-3/8". 1-1/2", 1-3/4" and 2" nominal bore sizes. What is the approximate bore of intake manifold and what is the center to center distance of of the carburetor mounting studs or cap screws? |
Richard A. Day Jr.
Senior Member
Username: richardday
Post Number: 644
Registered: 11-2003
| | Posted on Wednesday, July 30, 2008 - 12:13 pm: |
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The Zenith 61 series was used on the YT-1, PW-27 and M-60 AKA P-60 Its throat size is approx 1" and mounting studs or cap screws center to center are 1.25". Typical SAE 1-1/4" two bolt flange. The 61 series was used by a numbe of marine engine makers and from outwood appearance they all look the same. Some have fixed jets and other needle valves The Zenith marking is the inner circle number. Different numbers will be found on the same appearing carburetor. I have been told these simply represent minor manufacturing engineeing changes and not major changes to the carburetor.
The outer number is the part number assigned by the engine maker. 8070 is the Palmer assigned number for the Zenith 61 series carburetor.
61 series carburetors are found with different inner numbers such as 10118 with outer number AFT 122, 12547 inner number, outer AFT 122.
My suggestion if your intake throat matches the 61 series carburetor try it. Whatever you do don't used the industrial version of the 61 series as it has a straight throat and no pick up tube for purging the throat of excess fuel from too much choking. It is not legal in a boat. Works great but doesn't have a flange for the backfire trap. Hope this helps. |
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