Join Date: Oct 2011
Location: New York City
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Re: Yanmar 2gmf stuck in reverse gear
Okay, so I wriggled my way down to the gearbox -- it's not very accessible,
to say the least. The nameplate is on the starboard side, which is
*completely* inaccessible without a power saw, but I was able to snake
my cellphone around and take some pictures.
Near as I can make out, the nameplate reads:
MARINE GEAR - MODEL KM2-A
GEAR RATIO [Illegible -- 2.6? 2.5?]
OIL SAE 30/30 [Indistinct -- 20/30?] HD
OIL QTY 0.25 LI
KANZAKI KOKYUKOKI MFG CO LTD
There is a bolt head labelled OIL on top, to starboard. There's another bolt
head on the port side, right at the aft lower edge of the side of the housing,
which I conjecture may be the oil drain. There's also an adjusting screw
on top, on the port side, which appears to affect the stiffness of the shift
I was able to muscle the gearbox out of reverse and into the various gears
a few times, so the immediate problem is solved for the moment. I didn't
have time to detach the shift cable, but I kinda think there may be some
stiffness both in the cable and in the box itself.
I'll try an oil change and top-up. Can anybody resolve the question
of oil type? My photos of the name plate are pretty fuzzy.
By the way, I found it even harder to get back *out* of the gearbox
area than it was to get in. The boat's out on its mooring in the Hudson
River; I was by myself; it was getting dark; and I had a rather anxious
moment after one of my 65-year-old vertebrae gave me a nasty
reminder of its presence and discontent. The joys of sailing!