Hi All
my name is Sam and I'm from South Africa. I purchased a boat with a Honda bf90 EFI two years back.
I've done roughly 30 hours. Earlier this year the motor started doing the following:
Sorry for the long post, but if rather give you all the info so that I dont waste your time with back and forth
Motor Starts
Rough idle and dies
When you hit the throttle it dies, if you increase the throttle gradually it sputters and eventually picked up RPM
So it seemed to be a fuel issue I found that the fuel pickup tube on the onboard fuel tank was rusted and that these particles ended up in the fuel system
Cleaned the Onboard Water Seperator
Replaced the HP Filer in the VST
Replaced the HP Fuel Pump
Replaced the Screen holding the fuel pump
Replaced all 0-rings in the fuel system
Had the injectors cleaned and serviced ( One was apparently faulty so they supplied me with a replacement ( refurbed)
Replaced the Mechanical Fuel Pum (Low Pressure)
Replaced Spark Plugs
Oil
Oil Filter
Thermostats
Poppet Valve
After all that I still had the problem, but much less pronounced.
I then removed the Intake and found dust and rust particles combined with what seems like a film of oil in the intake.
It seems that the flywheel started rusting and the particles were being sucked into the intake.
When I assembled everything I noticed the following:
I checked the fuses and removed the fuse box to check for current with multimeter, Fuse box works.
I checked all the ground connections
I checked the main wiring loom connectors and cleaned them up ( some had green corrosion)
So I'm down to three possible scenarios, and please correct me if I am wrong here:
Faulty ECM
Faulty Main Relay
Or Faulty Wiring loom
I ran the fuel pump direct on battery and it worked.
I would be grateful if someone can point me in the right direction or eliminate any of the three scenarios above
Many thanks
Sam
my name is Sam and I'm from South Africa. I purchased a boat with a Honda bf90 EFI two years back.
I've done roughly 30 hours. Earlier this year the motor started doing the following:
Sorry for the long post, but if rather give you all the info so that I dont waste your time with back and forth
Motor Starts
Rough idle and dies
When you hit the throttle it dies, if you increase the throttle gradually it sputters and eventually picked up RPM
So it seemed to be a fuel issue I found that the fuel pickup tube on the onboard fuel tank was rusted and that these particles ended up in the fuel system
- I did the following:
- Cleaned the fuel tank
- Replaced fuel lines and primer bulb
- Replaced the External Filter/Seperator
Cleaned the Onboard Water Seperator
Replaced the HP Filer in the VST
Replaced the HP Fuel Pump
Replaced the Screen holding the fuel pump
Replaced all 0-rings in the fuel system
Had the injectors cleaned and serviced ( One was apparently faulty so they supplied me with a replacement ( refurbed)
Replaced the Mechanical Fuel Pum (Low Pressure)
Replaced Spark Plugs
Oil
Oil Filter
Thermostats
Poppet Valve
After all that I still had the problem, but much less pronounced.
I then removed the Intake and found dust and rust particles combined with what seems like a film of oil in the intake.
It seems that the flywheel started rusting and the particles were being sucked into the intake.
- I cleaned the throttle body
- I cleaned the intake manifold
- I cleaned the airbox
When I assembled everything I noticed the following:
- No Battery Light on indicator panel
- No MIL ( Check engine light ) on the indicator panel
- Double Beep when I turn ignition on.
- Green Light on the Remote control
- Engine starter engages but does not start
- Fuel Pump does not come on when I turn the key
- Powet trim doesnt trim up ( tapped the PTT relay and it worked)
I checked the fuses and removed the fuse box to check for current with multimeter, Fuse box works.
I checked all the ground connections
I checked the main wiring loom connectors and cleaned them up ( some had green corrosion)
So I'm down to three possible scenarios, and please correct me if I am wrong here:
Faulty ECM
Faulty Main Relay
Or Faulty Wiring loom
I ran the fuel pump direct on battery and it worked.
I would be grateful if someone can point me in the right direction or eliminate any of the three scenarios above
Many thanks
Sam