boardhauler
Contributing Member
Hello everyone,
I could use some expertise and troubleshooting help. Sorry for the long post, but, details.......
I have a Mercury 30HP EFI 2006 with power trim and remote control (NEW).
I purchased it used. It appeared to start and idle perfect.
I noticed that the factory LP fuel filter was missing. I ordered the correct part, and put in a Sierra in line plastic fuel filter.
I filled the clean tank with ethanol free gas, 3 1/2 gallons.
The first time out on the water it started & ran great for about 2 miles, then I noticed a power drop while at wide open throttle. It still ran on plane. When we got to our destination (2 miles later) it started stalling when idling. It would start right back up. If I left it at idle it would stall. If I pushed the throttle it would run. We ran back to the ramp. It stalled on idle multiple times at the ramp.
Back at home on the ears, it started, but would stall unless I turned on the fast idle lever.
I mounted the correct factory LP filter (plastic bowl w/screen inside)
I opened the fuel reservoir, removed the HP pump and pressure regulator, cleaned everything including the intake screen, float, passages and seat (only minor stains, no gunk)
I put on a new High Pressure fuel filter
Put dielectric great on plug connections, and other connectors.
Replaced the spark plugs (the old ones looked fine)
Replaced the water pump, plate, housing and gasket (the old one was ok, wear on the SS housing and rubber tips)
Replaced the lower unit oil (the old oil was black, but no filings or debris)
I ran it on the ears and the tach read approximately 1000-1050 RPM at idle (which is a bit fast, 850-875 is spec) I have a video of this.
We took it out on the water today.
It started right up.
Right at the ramp/trailer, when shifting to reverse, there was not power, only weak idle speed
We pushed off, drove away and it ran out good (maybe a little weak, it was hard to get on plane, I have a 380 lb Avon RIB)
We drove about 4-5 miles in chop, wakes, and wind. On and off plane. Then trolled around for 10 minutes.
When I tried to put the throttle down again, it would not get on plane, a minute later it stopped running, dead in the water.
It would not start
Got a tow home from a great guy, that saw me paddling to anchor.
It won't start on the ears
Nothing
I checked the plugs and they look fine
After cranking, I did not smell fuel like I expected when I removed the plugs
I grounded 2 of the plugs, cranked it and saw a spark on each
I put 12v direct to the HP pump and heard it run
I pushed the schrader valve on the fuel rail and fuel came out (I don't have a proper pressure gauge, but I read at least 20psi on my bike pump gauge).
Any ideas?
I could use some expertise and troubleshooting help. Sorry for the long post, but, details.......
I have a Mercury 30HP EFI 2006 with power trim and remote control (NEW).
I purchased it used. It appeared to start and idle perfect.
I noticed that the factory LP fuel filter was missing. I ordered the correct part, and put in a Sierra in line plastic fuel filter.
I filled the clean tank with ethanol free gas, 3 1/2 gallons.
The first time out on the water it started & ran great for about 2 miles, then I noticed a power drop while at wide open throttle. It still ran on plane. When we got to our destination (2 miles later) it started stalling when idling. It would start right back up. If I left it at idle it would stall. If I pushed the throttle it would run. We ran back to the ramp. It stalled on idle multiple times at the ramp.
Back at home on the ears, it started, but would stall unless I turned on the fast idle lever.
I mounted the correct factory LP filter (plastic bowl w/screen inside)
I opened the fuel reservoir, removed the HP pump and pressure regulator, cleaned everything including the intake screen, float, passages and seat (only minor stains, no gunk)
I put on a new High Pressure fuel filter
Put dielectric great on plug connections, and other connectors.
Replaced the spark plugs (the old ones looked fine)
Replaced the water pump, plate, housing and gasket (the old one was ok, wear on the SS housing and rubber tips)
Replaced the lower unit oil (the old oil was black, but no filings or debris)
I ran it on the ears and the tach read approximately 1000-1050 RPM at idle (which is a bit fast, 850-875 is spec) I have a video of this.
We took it out on the water today.
It started right up.
Right at the ramp/trailer, when shifting to reverse, there was not power, only weak idle speed
We pushed off, drove away and it ran out good (maybe a little weak, it was hard to get on plane, I have a 380 lb Avon RIB)
We drove about 4-5 miles in chop, wakes, and wind. On and off plane. Then trolled around for 10 minutes.
When I tried to put the throttle down again, it would not get on plane, a minute later it stopped running, dead in the water.
It would not start
Got a tow home from a great guy, that saw me paddling to anchor.
It won't start on the ears
Nothing
I checked the plugs and they look fine
After cranking, I did not smell fuel like I expected when I removed the plugs
I grounded 2 of the plugs, cranked it and saw a spark on each
I put 12v direct to the HP pump and heard it run
I pushed the schrader valve on the fuel rail and fuel came out (I don't have a proper pressure gauge, but I read at least 20psi on my bike pump gauge).
Any ideas?