klemmy
07-09-2014, 05:02 PM
We have a 2011 Mobius LSV with Indmar 325 Assault. Fuel pump and filter are inside fuel tank. We hooked up a fuel pressure gauge and when idling it is perfect at 60 psi but once we put it in gear and throttle up the pressure drops severely, the more throttle we give the lower the pressure goes. Also when we shut the boat off the pressure drops to zero. This is why it idles fine but will not get over 3000 rpm's and backfires when you give it too much throttle.
I'm guessing the pressure should stay even when the boat is off? Also, what could be causing the pressure to drop when throttling up? Bad fuel pump? Bad fuel regulator or something else altogether? This fuel pump is $664 from Moomba so I'm trying to confirm it is the pump before dumping a ton of cash into a guess.
Anyone have any thoughts on this?
I'm guessing the pressure should stay even when the boat is off? Also, what could be causing the pressure to drop when throttling up? Bad fuel pump? Bad fuel regulator or something else altogether? This fuel pump is $664 from Moomba so I'm trying to confirm it is the pump before dumping a ton of cash into a guess.
Anyone have any thoughts on this?