ARCO Marine FP009 Fuel Pump for Yamaha F75-F115 4-Stroke Outboards

If your Yamaha four-stroke has started acting hungry, hard starts on a cold morning, a stumble when you push the throttle down, maybe a stall at idle after a long run, the fuel pump is one of the first things worth checking. The ARCO Marine FP009 is a direct replacement fuel pump built for Yamaha F75, F80, F90, F100, F115 and LF115 outboards from the 2000 model year forward. It drops into the same spot the factory pump lived in, so you're not fabricating brackets or re-routing fuel line to make it fit.

ARCO has been building marine engine parts for close to 60 years, and this pump is a good example of why boaters keep coming back. Every unit gets tested and re-tested past normal operating conditions before it ships, so what shows up at your dock is a part you can count on to move fuel the way the engine expects. You get OEM-quality or better without paying the dealership markup. For a part that lives between your tank and your powerhead, that kind of reliability matters more than a few dollars saved.

So who needs one of these? Usually it's an owner chasing a fuel-delivery gremlin. A failing pump on a 4-stroke shows up as weak acceleration, a top end that won't hold, or an engine that fires and dies until you pump the primer bulb by hand. If you've already swapped the fuel filter, checked the primer bulb and looked over the lines, and the boat still won't hold rpm at wide-open throttle, a tired pump is the usual suspect. This is also a smart part to keep in the spares box if you run offshore or fish far from the ramp. A dead fuel pump ends the day fast, and it's rarely something you can limp home from.

Fitment is straightforward but worth double-checking. This pump covers the Yamaha F75, F80, F90, F100, F115 and the counter-rotating LF115, all four-stroke, all gasoline, model year 2000 and up. Match your engine's model designation and year before you order. Because the counter-rotating LF115 shares the same family, this single part number covers a lot of transoms, everything from center-console fishing boats to bay boats and pontoons running these mid-range Yamaha fours.

Install is a job most hands-on owners can handle in an afternoon. Relieve fuel pressure and have rags ready, because there's always a little gas left in the lines. Note how the old pump is oriented before you pull it so the new one goes back the same way. Lightly grease any O-ring before it seats, a dry seal can nip during assembly, and snug the fittings down without gorilla-torquing them. Before that first start, work the primer bulb until it's firm to push fuel up and clear any air out of the system. Air pockets are the number-one reason a fresh pump seems to hesitate on the first crank.

One more thing worth saying out loud. Today's ethanol-blended pump gas is harder on fuel systems than the fuel these engines drank twenty years ago. Ethanol pulls moisture and breaks down varnish, and that gunk is rough on pumps, filters and injectors alike. Run a good water-separating fuel filter upstream, keep fresh fuel in the tank, and treat the gas if the boat's going to sit. Take care of the fuel side and a quality pump like the FP009 will give you seasons of quiet, dependable starts.

Bottom line, this isn't a part you think about until it strands you. A fuel pump is one of those quiet components that just needs to work every time you turn the key. Buying the ARCO FP009 now, whether the old one has already failed or you're getting ahead of it on a high-hour engine, means you're back on the water instead of stuck at the dock waiting on a special-order dealer part. Keep the box, note the part number on your maintenance log, and you'll know exactly what to order next time.