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Re: Re: Re: H carb
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Posted by RK Smith on March 31, 1999 at 04:37:18:
In Reply to: Re: Re: H carb posted by Gene on March 31, 1999 at 02:50:36:
Good for you, with a couple of hints: The idea about a gallon of cleaner with a basket inside from Advance Auto is good. I did that, the carb pieces are large but will fit and soak in the basket. The idle jet fitting is tiny and fragile, and if you can't get the old one out, take a tiny drill bit on your drill and slowly drill through the center shaft of the idle jet. Very slowly and gently. You'll slowly cut away the brass body and brass threads and leave the casting intact with receiving threads o.k. When you put the new idle jet in, screw it down gently only until it seats, no more than 1/2 turn beyond, or you'll strip it. Make sure and clean out the passage all the way from the main jet needle through the seat and see the end of the cleaning wire or drill emerge from the back side of the seat and contact the sidewall of the main jet shaft. If you don't, you can't be sure this passage is clean. Take a drill bit that matches the side of the main jet nut threads, and from a straight angle, slowly drill "grind" into the packing nut material. You will pretty quickly remove all of it until the shaft tapers under the threads down to the size that only the main jet needle will go through. Then you can be sure all packing is removed and the shaft is perfectly clean. When you put the carb back together, gas *must* be able to drain from the float bowl through the shaft hole at the bottom of the bowl, to the main jet needle "seat" and through the seat to the main jet and idle jet. To test this, take the completed bottom section of the carb and fill it with gasoline to the level that it should come out of the top of the main jet by gravity (put your finger over the main jet empty nut hole and the main jet securing nut hole in the back to keep gasoline from running out there)If you fill the bowl to the top and nothing comes out the new top end of the main jet, then you haven't cleaned the passages enough. This is where the vacuum in the venturi draws the gasoline into the air stream "carburates" with normal operation, so the gasoline must be able to get to the main jet and into the venturi. Make sure you're float has no fluid in it. If so, it won't work correctly, and unfortunately the kits don't have a float in them, only the little float valve that goes under the float. New floats are $30 or so. The kit will tell you how to set the main jet needle, idle jet needle, and throttle shaft baffle screw. Before you crank, set them with religion right on the mark. I did that with mine, and it was just about dead right. Don't forget and leave out the venturi, which is a small round metal "neck" that fits between the carb pieces at the last step of reassembly with the new gasket. Good luck. Mine turned out like a charm.
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