Bristol 29.9 Auxiliary Power

The Bristol 29.9 came with several engines during it's production run. Many, including hull #63, were built with the Yanmar 2QM15. The information below consolidates data from the 2QM15 Service Manual and Operation Manual for a 1978 model engine.

Yanmar 2QM15 Specifications

 

Model			2QM15	2QM15G
Type			Vertical 4-cycle water-cooled diesel engine
Combustion chamber			Precombustion type
Number of cylinders			2
Bore x stroke		mm	75 x 75
Displacement		l	0.662
Continuous rated output (DINA)	Output/Crankshaft speed	HP/rpm	14 / 3000
	Brake mean effective pressure (BMEP)	kg/cm3/m/s	6.34 / 7.5
	Propeller speed	rpm	1400	1060
One hour rating (DINB)	Output/Crankshaft speed	HP/rpm	15 / 3000
	Brake mean effective pressure (BMEP)	kg/cm3/m/s	6.80 / 7.5
	Propeller speed	rpm	1400	1060
Compression ratio			23:01
Fuel injection timing		deg	bTDC 27
Fuel injection pressure		kg / cm2	160 +- 10
Engine weight (dry)		kg	145
Power takeoff position			Flywheel side
Direction of rotation	Crankshaft		Counter-clockwise (viewed from clutch side)
	Propeller shaft		Clockwise (viewed from clutch side)
Cooling system			Sea water forced cooling (rubber impeller water pump)
Lubrucation system			Closed force lubrication
Starting system			Electric and manual
Reduction gear system			Spur gear constant mesh system
Clutch			Wet multi-disc mechanical type
Reduction ratio	Ahead		2.14	2.83
	Astern		2.5	2.5
Engine size	Overall length	mm	698
	Overall width	mm	452
	Overall height	mm	553
Lubricating oil capacity (rake angle 8 degrees)	Total	l	2.5
	Effective	l	1
Clutch	Total	l	0.7

Exterior Views

Starboard Side from Bow

Port Side from Stern

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