Archimedes BSM

• 3.5 hp
• 1927

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

• Archives

  Swedish Outboard Motors – history of Swedish outboards ↗ (external link)

  Enthusiast site about Archimedes, Penta, Husqvarna, Electrolux and others, 1912–1979.

• Forum

  AOMCI forum: Archimedes B22 ↗ (external link)

  Antique Outboard Motor Club, thread about the B22.

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Related models

BS (Balans)

Outboard

2 cyl · 2.5 hp · 1912

→

BSII

Outboard

2 cyl · 500 cm³ · 5 hp · 1914

→

BSP

Outboard

2.5 hp · 1928

→

BSRB

Outboard

345 cm³ · 14 hp · 1928

→

Service guides

Replacing the impeller →Winterize a boat engine →

Frequently asked questions about BSM

Where can I find the owner's manual for BSM?

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

Sources

• Swedish Outboard Motors (lagerholm.com): Archimedes ↗ (external link)
• Wikipedia: Archimedes AB ↗ (external link)