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Mr 4d55 supply
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G63b dies when giving gas
Hey Guys, I rebuilt my g63b and it idles great and if i give it just the slightest bit of gas it dies. Original mikuni super clean. Valves checked, new plugs and wires. No vacuum leaks what else ??
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Doctorates Degree
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Blocked primary jet? Try purging the carb by cupping a hand over the throats while it's running. If you can get it to pick up fuel then hit the throttle and try purging it again. The accelerator enrichment jet is easy to check and doesn't require the engine to be running to test it - hold the choke butterfly out of the way, open and close the throttle quickly by hand and you should be able to see and even hear the fuel squirting from the jet in the side of the primary throat. No shot of fuel = damaged diaphragm in the pump.
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Doctorates Degree
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Option #2 - fuel hoses not hooked up correctly. If you swap the main fuel line from the fuel pump with the accelerator enrichment pump on the side of the carb, it won't have enough fuel pressure to run under throttle.
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