Boat Engine 3H6-04000-0/1/2/3/4/5/6/7 3H6040000M 3H6040001M 3H6040002M 3H6040003M 3H6040004M 3H6040005M 3H6040006M 3H6040007M Fuel Pump for Tohatsu & for Nissan Outboard MFS NSF 4 5 6 8 9.8HP 4 stroke

These are very well made pumps. Appear to be precision machined and have a metal reed instead of the gasket and plastic reed found in other models. These can also be adapted to use on early Yamaha 9.9 four stroke outboards. The inlet is on the bottom instead of the side with the outlet. You can reroute the inlet hose and save a lot of money. The early Yamaha pumps are upwards of $100. Other option is to swap your old reed housing onto the new pump, if it’s in good shape. You can also remove the brass plug on the new pumps inlet side, use it to plug the bottom inlet, then cut the bottom inlet hose fitting off, drill and tap a brass inlet on the side. Then you have inlet and outlet on the side exactly like the OEM Yamaha pumps.

Works well

Had an enlarged diaphragm and found this replacement with overnight shipping. New pump is slightly different than the old. In pictures attached the new pump has caps on inlet and outlet and the other pump was the old one from my motor. The piston was a different shape and from the mounting holes to the surface with the arrow it was slightly thicker but it mounted and ran just fine. Only idled a bit but so far I'm happy with it.

UPDATED: When I removed the old fuel pump, the mounting bolts came out smoothly. When I installed the new pump, it fit into the opening on the engine as expected. When I tried to thread the bolts back it, I had a difficult time because the mounting hole on the new pump did not align exactly. It was too late to take the boat out for a sea trial, but I will in the next few days. I have a 30 day window to return it. I would also think that they would supply a new rubber "O" ring, so I did not have to reuse the old one. I have UPDATED this review to include the seller trying to work through the issue. Good Customer Service.

The fuel pump was the exact fit for my mercury 99 pro kick seems to pump fuel just fine

Worked perfectly

This does NOT fit as advertised, the mounting holes are just a fraction of an inch off and the bolts won't fit. Save yourself the hassle and just buy an OEM fuel pump.....

So, the engine runs. Still not sure its good though. The contact plunger to mechanically operate the pump was not the same as the factory unit replaced. Engine was having some performance issues before replacement, but ran without dieing. It never died. Now it dies after 15-20 minutes while at higher throttle levels. Going to put orginal pump back on. Thats just the risk of trying aftermarket.