Join Date: Aug 2007
Location: Bristol, Rhode Island
Thanked 4 Times in 4 Posts
Rep Power: 10
The Universal diesel engine in your C-25 is either a Model M-12 (based on a Kubota Z-400 block) or an improved M2-12 (based on a Kubota Z-430 block), depending on the year the boat was built. Both engines are fitted with the Hurth HBW-50 marine transmission.
It should be filled with 0.29 quarts of Dexron III transmission fluid. The dipstick is part of the filler plug and has an indent ring mark showing "full." According to the engine owner's manual, "when checking the level, the dipstick is to be inserted only, do not screw in." Tighten the dipstick after adding the oil or checking the level.
The original spec calls for "Type A" automatic transmission fluid, which of course is not available. Alternatively, you can use Dexron III (General Motors) or M2 C33G (Ford). The manual cautions against mixing types.
Joe - s/v Assignment, Catalina 320