Recently my '01 Mobius V, with an Indmar Assault TBI 5.7l, would crank but would not start. I found the fuel pump fuse was blown. After tapping on the low pressure fuel pump I could get the system to pressurize (low pressure fuel pump would run for ~2 seconds), however, the fuse would blow intermittently. I disconnected the high pressure fuel pump and the fuel pump fuse continued to blow intermittently.

I replaced the low pressure fuel pump with a Carter P4389 from Amazon as it was a direct replacement for $70, not $200+ as found on boat part websites. I also read that a Carter P61171 is a direct replacement for the high pressure fuel pump. This pump is ~$80 on Amazon, not $250+ as found on boat part websites.

Replacement was quite simple. Be careful to install the electrical connector retention clip correctly or the connections will vibrate loose.

Chru