Join Date: Apr 2012
Thanked 12 Times in 12 Posts
Rep Power: 5
Re: 2GM 15 dies when I put it in Fwd
2500 rpm is not enough, but it may not be a lack of power, it may be something as simple as throttle cable rigging.
I suggest that you get it idling at 900 to 950 rpm, if that is where it will shift into gear smoothly. Get someone to then put it into gear while you watch for any movement of the throttle lever where it goes on to the fuel control unit. It is just possible that some kind of interference or movement is happening when you go in one direction but not the other, or as I said earlier, the folding prop is masking the problem in reverse because there is less resistance.
In theory the idle stop should prevent RPM going below whatever you have set the idle at, but maybe the stop screw has gone missing? My 2GM sometimes stalled when cold and going into gear at 900 rpm. Just half a turn of the idle stop brought it up to 950 rpm and since then it has been OK.
At the other end of the scale, i.e. full throttle, make sure that the throttle lever is moving through its full range to the WOT position. I am not sitting in front of my engine, so I can't remember if there is a visible stop at the high end. If not, you may have to drop the throttle cable off while you move the lever by hand to compare the range of movement.
Sometimes it can be the simplest thing. You can only hope.....
Last edited by arvicola-amphibius; 05-26-2013 at 09:39 PM.