Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
Below is a recap of the diesel option on the 250 wing keel.
The Yanmar 9hp is a single cylinder engine without a heat exchanger for cooling the engine. The output is facing forward and is mated to the Saildrive SD20. The portion below the hull looks and operates like an outboard lower unit.
Specifications from the Yanmar and sail drive manuals: Engine model - 1GM10C Output speed - 3,400 rpm Compression ratio - 23:1 Cooling system - direct seawater cooling (rubber impeller water pump) AC generator - 12V, 35A Dimensions (L x W x H ) - 21.81" x 16.14" x 19.09" Weight - 167 lbs
Saildrive - SD20 Reduction gear system - constant mesh gear with dog clutch Direction 0f rotation - counterclockwise viewed from stern Reduction ratio - 2.64 (ahead and astern) Weight - 66 lbs
Fuel tank - aluminum factory tank Capacity - 17 gallons Dimensions (L x W x H) - 27.5" x 21" x 10" Weight - 30 lbs Range - 2,400 rpm, 3.5knots, 0.2 gal/hr ~ 300 nautical miles Range - 3,400 rpm, 5.5knots, 0.43 gal/hr ~ 220 nautical miles
Regards, John Westlawn Institute graduate Yacht Design and Naval Architecture 04 Catalina 250 WK Standard rig w/wheel steering Yanmar 9hp diesel
Great dependable, lightweight, compact little diesel with a wonderful range. Like the sail-drive arrangement... first I've ever seen in a C250W Your boat would be very maneuverable and great in tight spots Is raw seawater cooling the engine. Is there anyway to flush?
Henk & Johanna "Floating", a few off your "barnacles". "Someday Lady" '95 C250WB #151 ('03 - 2016) "Sea ya" 30ft Bayliner (04-2018 - 09-2018) "Mariah" '96 C250WB #191 (05-2019 - 15-05-2023) "Lady J" '00 C250WK #499 (05-2021 - 09-2022)
Henk, the sail drive looks like an outboard lower unit. When it is on the trailer, you use muffs to flush the engine, just like an outboard. Seawater is in the engine for cooling. Not exactly thrilled with the potential corrosion activity in the engine, but it is extremely simple.
Thanks, John
Regards, John Westlawn Institute graduate Yacht Design and Naval Architecture 04 Catalina 250 WK Standard rig w/wheel steering Yanmar 9hp diesel
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.