Engine
- Yanmar 4JH2E, 50 hp inboard, freshwater-cooled diesel
- Repowered 1998 (current engine)
- Serpentine belt conversion driving the Balmar 120A alternator
- Capacity (with filter): 4.8 L (5.1 qt)
- Grade: Chevron Delo 400 XLE 15W-40 CK-4 (or any 15W-40 CD or higher)
- Groco filter and main thru hull are in the quarterbirth forward panel.
Front top of the motor. When replacing drain all the coolant out of the elbow (you won't get a good gasket seal otherwise).
You have to get all that gunk out, including the thin paper ring gasket that looks like it should be rubber. Tip: put a paper towel in there and run a shop vac right at it while you scrape to keep the gunk from getting in there and clogging the exchanger.
When changing the coolant, there are three spots that need to get drained.
This is the easy one.
(hook up a little hose to this, make sure to take the cap off the heat exchanger so it can vent or nothing will come out)
These bastards are hard to get to and hard to find. They have little plastic knobs that you can hand-screw in or out. The starboard one has a hose on it (leading nowhere?) so plug that hose into your drain hose. The port one you'll plug directly to the port on the bottom.
(there's the little bastard)
(the starboard one is almost to the back of the motor, right below the mixer elbow)
(port is easier, just follow that wire loom)