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Thread: Surging RPMs
10-09-2013, 05:13 PM #1
The other day we were out surfing and towards the end my boat began surging slightly while at a constant speed, fluctuating a few hundred RPM up and down at a pretty steady frequency. Almost seemed like it was running out of gas (it wasn't). I thought maybe it was PP related at first, and I don't remember now if I tried turning off the PP and going manual but pretty sure I did and it still did the same thing. I'm thinking possibly fuel filter, or God forbid a fuel pump. Anything else simple I'm overlooking that could cause this?Boats previously owned - 2000 Supra Launch, 2003 Outback, 2006 Mobius LSV
10-09-2013, 05:28 PM #2The years have been kind, it's the weekends that have done the damage.
2001 MobiusV - Slightly Modified...
10-09-2013, 06:36 PM #3
If you haven't swapped the fuel filter lately that would be a good first step. Might be a good idea to mix in some fuel additives in case you have some water in the tank.Dan
08 LSV Mods
10-09-2013, 10:47 PM #4Senior Member
- Join Date
- Jan 2008
- Pensacola, FL
check tranny oil level1997 MasterCraft 205
2008 Moomba Outback
1999 MasterCraft Sportstar OB
1992 MasterCraft 205
1999 Malibu Response LX
1987 Marlin Magnum Skier
10-10-2013, 11:48 AM #5
Hmmmm...no problems last night at all. I'm wondering if my gas gauge is off a little? I added 5 gallons and had no problem at all. I'd be shocked if it was only due to low fuel.
Either way, I'll be going through everything during winterization in a few weeks and it'll have a new fuel filter regardless.Boats previously owned - 2000 Supra Launch, 2003 Outback, 2006 Mobius LSV
10-10-2013, 01:44 PM #6
Could be a load of sugar or some water dumped in there by those waterski guys you teed off.My Mom said I'm not allowed to get wet!
2000 Outback LS (sold)
P5 Danielo Diamond 58"
10-10-2013, 04:51 PM #7
10-10-2013, 09:37 PM #8
Actually at this time of the year with the change in humidity and the relative dew points , condensation may set up in your ecm and disrupt the electrical signals until the circuitry has dried out from heat dissipation of the current flow. Not uncommon in the early spring and late fall09 21v LAUNCH
99 Outback LS. Sold
run your engine after you change your oil
68 th Member. WS420,HSE Revolution, OJ 466, Acme1157,1100 sacs,Kicker HLCD's n IX500.4, Supra Coolies