Pontoon Boat & Deck Boat Forum

Hey guys got a 08 Mercury 115 hp 4 stroke that's doing something I don't get, had the wrong prop on it when I bought and would only turn 4900 rpm,when I was trying to figure it out I pushed in the neutral button to rev it up to see it was a collapsed fuel line and it would only run up to 2300 rpm and sputter like crazy, put a different prop on it and it now runs 6100 rpm now, why won't it rev in neutral? Thanks

I do not think you can get full RPM's on neutral to prevent blowing the motor. I know I cannot with the three different boats that I owned.

depends on the controller you have most will not allow to rev up all the way, for above mentioned reasons.

Thanks thought thatight be it

Or your throttle cable is set too loose. The fast idle arm only has the ability to move the throttle arm about 1/4 of the throw. If the cable is loose then you might be using a lot of the first 1/4 before the cable actually moves the throttle arm. Mine has enough movement to get my engine to hit the 3000rpm neutral rev limiter but a fast idle/warmup lever is really not needed with todays EFI/DFI engines.

That might be it, my shifter is stiff and neutral is a little hard to find