Suzuki DF300B / DF350A

• 4.4 l
• 300–350 hp
• 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

• Boat engine smokes blue and burns 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

• The battery isn't charging and the 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 ↗ (external link)
  FLERA · PDF · 2021

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Service guides

Replacing the impeller →Winterize a boat engine →

Frequently asked questions about Suzuki DF300B / DF350A

Where can I find the owner's manual for Suzuki DF300B / DF350A?

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

What fuel does the Suzuki DF300B / DF350A use?

Suzuki DF300B / DF350A runs on petrol.

Sources

• Suzuki Marine: owner's manual (PDF) ↗ (external link)
• Suzuki Marine Greece (official importer): owner's manuals ↗ (external link)
• Suzuki Marine USA: Full Line Catalog 2026 (specifications, PDF) ↗ (external link)
• Wikipedia: Suzuki (en) ↗ (external link)