PROP TABLE LH Series

SELECTION
ENGINE
TRANSMISSION
PROPELLER

GM series
3JH2 - 3JH3 series
4JH2 series
4JH3 series
LH(A) series
LP(A) series
LY(A) series
CX series

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Yanmar Pleasure Boat Marine Engine Help

Propeller Selection - 4LH series - Kanzaki transmissions

Engine model	Gearbox		Propeller diameter		Propeller rotation
	model	ratio	Inches	millimeters	Left or Right hand
4LH-TE	KM5A	1.46	16	400	either
	KM5A	2.07	19.5	500	either
	KM5A	2.57	22	560	either
4LH-HTE	KM5A	1.46	16.5	420	either
	KM5A	2.07	20	520	either
	KM5A	2.57	23	590	either
4LH-DTE	KM5A	1.46	17.5	440	either
	KM5A	2.07	21	540	either
	KM5A	2.57	24	610	either

Propeller Selection - 4LHA-P series - ZF transmissions

Engine model	Gearbox		Propeller diameter		Propeller rotation
	model	ratio	Inches	millimeters	Left or Right hand
4LHA-HTP	ZF45A 8deg angle	1.26	15.5	400	either
	as above	1.51	17	440	either
	as above	2.03	21	530	either
	as above	2.43	23	590	either
	ZF45-1 parallel output	2.20	22	550	either
	as above	2.51	24	600	either
4LHA-DTP	ZF45A 8deg angle	1.26	16.5	410	either
	as above	1.51	18	460	either
	as above	2.03	22	550	either
	as above	2.43	24	610	either
4LHA-DTP	ZF45-1 parallel output	2.20	23	580	either
	as above	2.51	24.5	620	either
4LHA-STP	ZF63A	1.21	16.5	420	either
		1.56	19	490	either
		2.04	23	570	either *
		2.52	23.5	600	either

*While ZF claim the reduction is the same in forward or reverse, the HSW630A1 2.04:1 ratio transmission, now the ZF63A, was 2.10:1 in lefthand rotation. This meant the propellers, on a twin engine craft, had to be different to load the engines equally. If the engines are not loaded equally the most loaded engine will be overloaded, use more fuel and wear out a lot faster than the other.

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