Join Date: Aug 2009
Location: West Vancouver, BC
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what does an electric fuel pump on a 2QM15 Do?
on the weekend I was rewiring a new stereo onto my DC panel. I found a switch that made good sense: the DC Outlet switch. When I looked at the back though, there was another, hefty (maybe 12 gauge) line running off the switch. Tracing it, I found it connect 12 V+ to an electric fuel pump. Huh: why would an electric fuel pump be switched on the DC panel?
I've had the boat for 3 months and have started it up many times (over the warm summer) without too much issue: just a little slow to fire. On all these times I am sure that DC line has been switched off. I have never had an issue where the engine cuts out. This weekend I tried starting with that switch on, and I think it started up much faster.
I'm no mechanic, but I'm thinking that electric fuel pump aids in building some fuel pressure, which is particularly valuable for a faster start, but not essential when the engine's running and drawing fuel using the mechanical pump.
Am I on the right track, here? Thanks!