SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: H20Nut21Bahner on September 07, 2015, 01:44:02 PM
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I've briefly searched the interweb with no luck yet.
I have a Holley that the choke horn has been milled off. Is there any other way to identify what size it is?
The metering blocks have different numbers stamped on the side. Front has 73 jets, rear has 76
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It's possible it might be stamped on the main body.
Are you able to post a pic?
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Ive looked all over. Only numbers i found were stamped on side of metering block, different number front to rear.
I'll get some pictures in the morning
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There are also some numbers stamped on the butterflies
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If the carb is off measure the diameter of the throttle bores front/rear. This along with some other basic info (double pumper, vacuum secondary, marine...) we should be able to identify what you have.
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So after cleaning off some heavily caked on mud and soot(was run on a circle track dirt car), I've come to the conclusion that it's a 750dp, manual secondary. Throttle bores measured roughly 1 5/8"
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That's a start. The DP from 650-800 all used 1 11/16 throttle bore diameters primary and secondary. 600's were 1 9/16 and 850's were 1 3/4. To narrow it down even more you'll need to measure the actual venturi.
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Thanks Keith. I picked up a marine 750, so it looks like this one will go back on the shelf unless someone needs a 750