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Suzuki DF60 / DF70 service guide

Oil, gear oil, spark plugs and the service schedule for the Suzuki DF60 / DF70 (60 to 70 hp, four-stroke), from the factory service manual, plus how we service it in Hawaiʻi.

Models covered: Suzuki DF60T (prefix 06001F) and DF70T, DF70WT and DF70WTH (prefix 07001F) four-strokes, 4 cylinder SOHC, 1298 cm³, multi-point sequential fuel injection.

Quick answers

How much oil does a Suzuki DF60 / DF70 take?
4.5 L (4.8/4.0 US/Imp. qt) oil change only; 4.8 L (5.1/4.2 US/Imp. qt) with filter.
What engine oil does a Suzuki DF60 / DF70 use?
API SE, SF, SG, SH or SJ, SAE 10W-40.
What gear oil does a Suzuki DF60 / DF70 use, and how much?
Suzuki Outboard Motor Gear Oil or SAE #90 hypoid gear oil. Quantity: 1050 ml (35.5/37.0 US/Imp. oz).
What spark plug does a Suzuki DF60 / DF70 use?
NGK BPR6ES (resistor type only), qty 4. Gap: 0.7 to 0.8 mm (0.028 to 0.031 in).
How often should a Suzuki DF60 / DF70 be serviced?
The factory schedule lists: Initial 20 hours; Every 50 hours; Every 100 hours; Every 200 hours. In Hawaiʻi's salt water we do a full yearly service every 200 hours or 1 year, whichever comes first, and a new engine needs its first (break-in) service.
When should the water pump impeller be replaced on a Suzuki DF60 / DF70?
The factory schedule says to replace it at 200 hours, and we follow that. In any case we never let it go longer than a year in Hawaiʻi's salt water.
What is the idle speed of a Suzuki DF60 / DF70?
650 to 750 r/min (700 ± 50; in-gear approx. 700), controlled by the IAC system; set with the by-pass air screw in the 22.5% fixed IAC mode.
What is the propeller nut torque on a Suzuki DF60 / DF70?
55 N·m (5.5 kg-m, 40.0 lb-ft).

Maintenance specs

Engine oilAPI SE, SF, SG, SH or SJ, SAE 10W-40
Engine oil quantity4.5 L (4.8/4.0 US/Imp. qt) oil change only; 4.8 L (5.1/4.2 US/Imp. qt) with filter
Engine oil filter14 N·m (1.4 kg-m, 10.0 lb-ft); oil the O-ring
Engine oil drain plug13 N·m (1.3 kg-m, 9.5 lb-ft), new gasket
Gear oilSuzuki Outboard Motor Gear Oil or SAE #90 hypoid gear oil
Gear oil quantity1050 ml (35.5/37.0 US/Imp. oz)
Gearcase leak test100 kPa (1.0 kg/cm², 14.2 psi)
Spark plugNGK BPR6ES (resistor type only), qty 4
Spark plug gap0.7 to 0.8 mm (0.028 to 0.031 in)
Spark plug torque28 N·m (2.8 kg-m, 20.0 lb-ft)
Idle speed, neutral650 to 750 r/min (700 ± 50; in-gear approx. 700), controlled by the IAC system; set with the by-pass air screw in the 22.5% fixed IAC mode
ThermostatOperating temperature 58 to 62 °C (136 to 144 °F)
Propeller nut55 N·m (5.5 kg-m, 40.0 lb-ft)
Valve clearance, coldIN 0.11 to 0.15 mm (0.004 to 0.006 in); EX 0.13 to 0.17 mm (0.005 to 0.007 in); lock nut 17 N·m (1.7 kg-m, 12.5 lb-ft)
Timing beltInspect every 200 hours; replace every 800 hours or 4 years. Arrow toward the direction of rotation; cam pulley bolt 60 N·m (6.0 kg-m, 43.5 lb-ft)

Service schedule

The factory maintenance intervals, with what is replaced and what is checked at each. Rows marked Hawaiʻi are our shop's yearly service for salt water use.

  1. Initial 20 hours

    Replace: engine oil, oil filter, oil drain plug gasket, gear case oil, gear case plug gaskets, propeller cotter pin

  2. Every 50 hours

    Replace: gear case plug gaskets

    Check: fuel filter, anodes

  3. Every 100 hours

    Replace: engine oil, oil drain plug gasket, gear case oil, gear case plug gaskets, propeller cotter pin

    Check: spark plugs, fuel filter, anodes

  4. Every 200 hours

    Replace: engine oil, oil filter, oil drain plug gasket, spark plugs, gear case oil, gear case plug gaskets, propeller cotter pin, water pump impeller

    Check: fuel filter, anodes

Source: Suzuki DF60/70 service manual for the 2003 model, 99500-99E10-01E. Specs can change by model year and serial number, so always confirm your exact model from the serial tag on the clamp bracket.

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