WT-644 Carburetor
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WT-257 Big Bore Carburetor
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WT-813 Big Bore Carburetor
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Venturi Bore: 12.7mm
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Venturi Bore: 12.7mm
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Venturi Bore: 12.7mm
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Throttle Bore: 15.84mm
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Throttle Bore: 15.84mm
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Throttle Bore: 15.84mm
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Primer Bulb: Yes
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Primer Bulb: No
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Primer Bulb: Yes
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Choke: Yes
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Choke: No
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Choke: No
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Mounting hole’s distance between centers: 31mm
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Mounting hole’s distance between centers: 31mm
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Mounting hole’s distance between centers: 31mm
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Accelerator System: No
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Accelerator System: No
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Accelerator System: Yes
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Starting point carburetor settings (High/Low)
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WT-813A Carb vs WT-257 Carb?
I’m still a little confused about which carb to go with on the high end marine engines.
Are there certain issues with some carbs on the high output marine engines?
What is the overall best performing carb to have on a modded engine and what are the differences?
WT-813A has an accelerator pump which increases throttle response. When looking for every last possible advantage throttle response is important.
WT-257/WT-1027 (same carb) is the go to choice for racers and carb upgrades.
Includes: BONZI BZX4 RACE ENGINE: raised exhaust timing and enlarged exhaust port, port matched intake manifold, machined lightened and top relieved piston, two oil grooves for lubrication at high RPM, increased intake volume in jug, modified flow direction, jug base machined for increased compression, zero drag seals, Walbro WT-257 big bore carb, BONZI Very Cool Water Jacket, Stainless Hardware Kit and BONZI carb velocity stackand NGK CMR7H spark plug! SKU: BZ2103-4 Categories: Engine Accessories, Hardware Parts, Zenoah Engine Parts, Zenoah Engine Mods Tags: Bonzi, Custom, Parts, RC Boats, Remote Control, Toy Boat, Water Sports
Carb upgrade for pum30 what would you recommend thanks
Walbro WT-257/WT-1027 – same carburetor. Good upgrade for Zenoah G300PUM.