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post #13 of Old 01-26-2013
aa3jy
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Re: Yanmar 3GM30F HP one-hour rating (??)

Quote:
Originally Posted by gamayun View Post
Oh, on haul out, it weighed 20,000 lbs, which is pretty close to the specs.
Actually your 38's design spec is more like...

FREEDOM 38 sailboat specifications and details on sailboatdata.com

..well within the capability of the Yanmar 3GM30F

Here are some details from the workshop manual:

Model 3GM30
Type: Vertical 4-cycle water cooled engine
Combustion Chamber: swirl pre combustion chamber
No cylinders: 3
Bore x stroke mm(in): 75 x 72 (2.95 x 2.83)
Displacement litre (in³): 0.954 (58.21)

Continuous rating output (DIN6270A)
Output crankshaft speed Hp/rpm (kW/rpm): 24/3400 (17.9/3400)
Brake mean effective pressure kg/cm² (lb/in²): 6.66 (94.71)
Piston speed m/sec (ft/sec): 8.16 (26.77)

One hour rating output (DIN6270B)
Output crankshaft speed Hp/rpm (kW/rpm): 27/3600 (20.1/3600)
Brake mean effective pressure kg/cm² (lb/in²): 7.07 (100.54)
Piston speed m/sec (ft/sec): 8.64 (28.35)

Compression ratio: 23.0
Fuel injection timing degree: b.TDC18±1°
Main power take off: At flywheel side
Front power take off: At crank shaft V pulley side
Direction of rotation - Crankshaft - Counter clockwise viewed from stern
- Propeller shaft (ahead) - Clockwise viewed from stern
Lubrication system: Complete enclosed forced lubrication.
Starting system: Electric and manual

Lubricating oil capacity (rake angle 8°)
Total litre (in³): 2.6 (158.65)
Effective litre (in³): 1.6 (97.63)

Engine weight with clutch (dry) Kg (lb) : 130 (287) Raw water
Engine weight with clutch (dry) Kg (lb) : 138 (304) fresh water

Gearbox
Model: KM3A
Constant mesh gear with servo cone clutch (wet type)
Lub oil: SAE# 10W-30, CC class
Lub oil cap: 0.3 ltr
Dry weight: 11.0kg (24.3 lbs)

Last edited by aa3jy; 01-26-2013 at 03:52 PM.
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