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Mercury FourStroke 4 / 5 / 6

  • 1 cyl
  • 123 cm³
  • 4–6 hp
  • Petrol

Engine data

Specifications for Mercury FourStroke 4 / 5 / 6
Power4–6 hp
Cylinders1
Displacement123 cm³
FuelPetrol
TypeOutboard

Autumn and spring plan for Mercury FourStroke 4 / 5 / 6

Here's what to do when hauling out and launching. Always follow the instruction book for your engine.

Autumn

  • Change the engine oilevery 100 hours or annually
  • Change gear oilevery 100 hours or annually
  • Lubricate the engine's grease pointsevery 100 hours or annually
  • Check the anodesevery 100 hours or annually
  • Replace the fuel filter on the suction side300-hour service kit (fuel filter, spark plugs, seals, water pump kit) 8M0181315 · Performed by a Mercury workshop. · every 100 hours or annuallyBuy: Marinshopen
  • Flush the engine with fresh water
  • Lubricate according to the lubrication schedule
  • Store the engine upright so that water drains out

Spring

  • Replace the impellerPerformed by a Mercury workshop. · every 300 hours or every 36 months
  • Check the gearcase oilMilky oil means there is water in the gear housing.
  • Check the propeller and anodes
  • Check that cooling water comes out of the tell-tale hole
Add to calendarTick off in the service bookTwo reminders a year: in April and in October.

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Good to know

Tips

Transport upright or with the tiller facing down

Mercury's manual for the 4/5/6 FourStroke specifies an upright position or tiller handle down during transport and storage to prevent oil leaking from the crankcase. Let the cooling water drain in the upright position first.

Troubleshooting

Starting problems

Runs rough, stalls or loses power

Smoke and exhaust

Oil, water and fuel

Electrics, alarms and fault codes

Drive, gearbox and trim

Outboard

Manuals

Spare parts

Spare parts for Mercury FourStroke 4 / 5 / 6
PartPart numberNoteSource
Service kit 300 h (water pump kit etc.)8M01208361 pcsBuy (1)4/5/6 hp, serial no. 0R411838 and higherMercruiserParts.com: Mercury 100/300-hour service kits (www.mercruiserparts.com)
300-hour service kit (fuel filter, spark plugs, seals, water pump kit)8M01813151 pcsBuy (1)4/5/6 hp, serial no. 0R411828 and above (Quicksilver)MercruiserParts.com: Mercury 100/300-hour service kits (www.mercruiserparts.com)

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Related models

Mercury FourStroke 2.5 / 3.5

Outboard

1 cyl · 85.5 cm³ · 2.5–3.5 hp · Petrol

Mercury FourStroke 6 EFI

Outboard

2 cyl · 209.8 cm³ · 6 hp · Petrol

Mercury FourStroke 8 / 9.9

Outboard

2 cyl · 209.8 cm³ · 8–9.9 hp · Petrol

Mercury FourStroke 15 / 20

Outboard

15–20 hp · Petrol

Service guides

Replacing the impeller →Winterize a boat engine →

Frequently asked questions about Mercury FourStroke 4 / 5 / 6

Where can I find the owner's manual for Mercury FourStroke 4 / 5 / 6?

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

How many cylinders does Mercury FourStroke 4 / 5 / 6 have?

Mercury FourStroke 4 / 5 / 6 has 1 cylinder.

What fuel does the Mercury FourStroke 4 / 5 / 6 use?

Mercury FourStroke 4 / 5 / 6 runs on petrol.

Sources

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