J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Replacing original 2GM with a 2YM15

I am considering having my old 2GM (from 1984) - still loyal, but rusty, smoky, a bit oily - replaced by a 2YM15 on FootLoose a 1984 model. By a mechanics, not me.
Anyone had done this already?
Is it a drop-in replacement - mostly? (I have the dimension diagram for the 2YM15 - but could not yet put my hand on the 2GM ones...so will measure by hand...)
Does it fit the original Kanzaki transmission?
Any notion of the price?

Thanks!

A fellow club member did this swap a few years ago. The transmission is different and is not swappable to the 2YM. The exhaust has a tall loop on port side requiring the cutting of the engine compartment bulkhead. He did it himself with the boat in the slip. About $7K for the engine with transmission......

Rob

Thanks so much Rob...
super useful.
Note - the J/30 84' variant dot not have this bulkhead. The engine as a whole is less accessible, but then, it has some pros :-)

This is from hull #55 the famous Sleighride once owned by Rod Johnstone. In our club there is a repowered J/30 with the newer cockpit. I don't have any photos of that installation. The owner bought the boat after the repowering took place. Let me know, I can probably get some photos of that installation, limited as they may be.
I really enjoy the engine access of the older design.

Rob

Thanks Rob,
With you on the accessibility aspect...although it only bites me when changing the oil - I need a long snake-funnel to fill it up...

Having photos of the installation on the 84+ vintage will surely make me less anxious - but then - not a showstopper for me nor anything urgent: your pics already gave me confidence I needed...

Thanks again.

OK. You will notice the new engine has the oil filter on the starboard side now. Not sure if that helps your access to the filter.

Thanks Rob, yes I noticed... I might actually have to move my raw water strainer... will see. I do not expect everything to fit right in :-) But if the engine fits, the fixation fits, and the overall engine+transmission fits my old 2GM propeller shaft length and alignment - I will be happy :-)

I own the boat Rob is talking about. Access is not all that bad. Everything you need is either in front or the starboard side of the engine. To do an oil change I have to pull the plywood behind the steps. The oil fill is just behind the bulkhead at the front of the cockpit. Even with a small funnel I can fill it. To change the filter I pull the plywood off the starboard quarter berth. The one issue (at least for me) is that the engine/transmission barely fits forward/aft. I think I have a different transmission than typical, so that might be why. You can't service a standard stuffing box with the spacing between the shaft coupling and shaft log. My mechanical called lasdrop and modified their stuffing box to the absolute minimum configuration to make it fit. The other odd thing is I'm missing quite a bit of engine pan. I'm not sure if that's normal or something about fitting the 2YM with the lower height clearance. I'll try to take some pictures this weekend.

Pictures and possibly the brand and model of the transmission ? at least if not the Kanzaki KMP2-1 shown in the 2YM15 Yanmar diagram with its dimension...
Thanks again.

According to the Yanmar specs the Kanzaki KM2P-1 transmission fits both the 2YM and 2GM series and for the J/30 uses 2.62:1 gear ratio.

When I had Rhapsody the 2GM raw water cooled engine had the oil filter on the port side. I've seen 2YM installations where a removable panel was installed on stbd side to easily access the oil filter. My J/109 with 3YM30 has a removable panel in the head just for that purpose. It's probably easy on the J/30 to use a scroll saw and make a cutout on the stbd side, then screw in a frame on the back to hold a piece of wood that would be removable for the oil change.