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Current Replies for 2gm 20 install
  2gm 20 install (capricous)
Posted: 12:59:03 pm on 1/23/2019 Modified: Never
Help   in black arts its says no problem with the yanmar instal ,but it looks like I have to raise the beds an inch or so  maybe more

Capricious Mark 3 Hull #599

  Re: 2gm 20 install (davidww1)
Posted: 3:29:49 pm on 1/28/2019 Modified: Never
Note that the article says, "The Yanmar 2GM and 2YM engines are virtually a drop-in replacement. You don't touch the glass (see Ralph's comment above). The steel angles on top of the fibreglass or wood beds need to be changed, but anyone who can use a measuring tape and hold a hacksaw and a drill can do that."

I had to take my original steel beds out and replace them to get the engine to the right height, but the difference is only in the bed height, not the width, so you don't have to do any glass work. That would have been a problem; drilling a few holes in steel angles then bolting them back in was not.

While you're in there with the engine out, replace every hose you can see. You'll never have better access (and you'll need to put in a larger exhaust hose). Also, I suggest you stick sound insulation to, at minimum, the underside of the cockpit and all the accessible areas around the front of the engine.

David Weatherston
Towser, Toronto
C&C 27 Mk IV

  Re: 2gm 20 install (capricous)
Posted: 5:28:33 pm on 3/28/2019 Modified: Never
Thanks David   Engine is in,new 2inch exhaust hose Painted the bilge before hand I did raise the beds 3/4 of an inch and am rewireing along with a million other things

Capricious Mark 3 Hull #599

  Re: 2gm 20 install (PaulB)
Posted: 8:14:28 pm on 4/22/2019 Modified: Never
Curious as to how easy it really was. I've taken some measurements and on paper at least it doesn't seem that the beds need to be raised at all. I've got a 2GM20F in my garage that I've been toying with swapping out for the temperamental 1GM10 in the boat.

Paul Baker
Sidney, BC
1974 Mk II

  Re: 2gm 20 install (capricous)
Posted: 8:14:22 pm on 5/18/2019 Modified: Never
It required about 3/4 of an inch raise. Didn't need a longer shaft as have read in black arts, had a shaft saver which added and inch.

Capricious Mark 3 Hull #599