PROP TABLE LH Series

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Yanmar Pleasure Boat Marine Engine Help

Propeller Selection - 6LPA-P series - ZF transmissions

Engine model	Gearbox		Propeller diameter		Propeller rotation
	model	ratio	Inches	millimeters	Left or Right hand
6LPA-DTP	ZF63A 8deg angle	1.22	15.5	390	either
	as above	1.56	18	450	either
	as above	2.04	21	530	either
	as above	2.52	24	605	either
	ZF63-1 parallel output	1.51	17.5	450	either
	as above	1.93	20	520	either
	as above	2.50	24	600	either
	as above	2.78	25	640	either
6LPA-STP	ZF63A 8deg angle	1.22	16	410	either
	as above	1.56	18.5	470	either
	as above	2.04	22	560	either
	as above	2.52	25	630	either
	ZF63-1 parallel output	1.51	18.5	470	either
	as above	1.93	21	540	either
	as above	2.50	24.5	630	either
	as above	2.78	26	670	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.