Carburetor Comparison - Walbro WT-257, WT-813 and WT-644

WT-644 Carburetor

WT-257 Big Bore Carburetor

WT-813 Big Bore Carburetor

Venturi Bore: 12.7mm

Throttle Bore: 15.84mm

Primer Bulb: Yes

Primer Bulb: No

Primer Bulb: Yes

Choke: Yes

Choke: No

Mounting hole's distance between centers: 31mm

Accelerator System: No

Accelerator System: Yes

BZ2168

$39.95

$44.95

BZ2038

$54.95

Starting point carburetor settings (High/Low)

WT-257	WT-488	WT-603	WT-644	WT-813
H - 1 turn L - 2 turns	H - 1 1/8 turns L - 1 1/2 turns	H - 1 1/2 turns L - 1 5/8 turns	H - 1 1/2 turns L - 1 1/2 turns	H - 1 1/2 turns L - 1 1/2 turns