Honda Marine Honda BF90EFI

• Petrol

Save my engine

Troubleshooting

Starting problems

• Boat engine won't start after the winter
• Boat engine won't start when warm

Runs rough, stalls or loses power

• Boat engine dies at idle or when shifted into gear
• Boat engine hesitates or dies on acceleration
• Boat engine stops after a while

Smoke and exhaust

• The boat engine smokes blue – burning oil
• White smoke from the boat engine exhaust

Oil, water and fuel

• Petrol smell in the boat – fuel leaking from the engine
• Water in the fuel or tank of the boat engine
• Water in the engine oil – the oil is grey or milky

Electrics, alarms and fault codes

• Battery not charging – charge warning light is on
• The alarm is sounding – what do the warning lights mean?
• Oil pressure alarm on the boat engine – low oil pressure

Drive, gearbox and trim

• Trim not working – the drive won't go up or down
• Gear will not engage or jumps out

Outboard

• The outboard only runs on choke or dies at idle
• Outboard not cooling – no tell-tale stream
• The outboard won't start
• The outboard loses power or won't reach full revs
• Water in the outboard's gearcase oil

Manuals

• Official

  Owner's Manual (serial no. BBBJ-1000001 through 4999999) ↗ (external link)
  EN · PDF
• Official

  Owner's Manual (serial no. BBCJ-1000001 through 9999999) ↗ (external link)
  EN · PDF

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Service guides

Replacing the impeller →Winterize a boat engine →

Frequently asked questions about Honda BF90EFI

Where can I find the owner's manual for Honda BF90EFI?

Links to owner's manuals and workshop manuals are available under Manuals.

What fuel does the Honda BF90EFI use?

Honda Marine Honda BF90EFI runs on petrol.

Sources

• Honda Marine: manuals for BF90EFI ↗ (external link)
• Honda Marine: owner's manuals ↗ (external link)