Suzuki · Outboard

Suzuki DF15A

The DF9.9B, DF15A and DF20A are one engine: a 327 cc in-line twin four-stroke with a belt-driven overhead camshaft and electronic fuel injection that needs no battery, built since the 2013 model year. The three differ only in engine-control tuning and rated output (7.3, 11.0 and 14.7 kW) and share filters, water pump kit, anodes, gaskets, propellers and the maintenance kit, which is why this page covers all three. They come with tiller or remote control, pull or electric start, manual or power tilt and 15 or 20 in shafts, and are common on tenders, RIBs and small fishing boats, in the long-shaft version also as an auxiliary on small yachts. The older carburetted DF9.9 and DF15 (up to 2013) and the 208 cc DF9.9A/DF8A are different engines and not covered here.

Manuals & documents
Wear parts & part numbers
Service intervals
Specifications
Good to know
On the marketplace

Manuals & documents

The links go straight to Suzuki. We host no manuals or drawings — the manufacturer’s copy is the current one.

Owner’s manual DF9.9B / DF15A / DF20A, 99011-89LH0-000 (Japanese) Operation manual suzukimarine.co.jp · PDF · JA
Owner’s manual DF9.9B / DF15A / DF20A, 2025 edition, Suzuki Netherlands (accept the terms to download; page in Dutch) Manual portal suzuki.nl · NL
Owner’s manual request, Suzuki Marine Australia Manual portal suzukimarine.com.au · EN
Printed owner’s and service manuals, Suzuki Canada shop Manual portal suzuki.ca · EN
Suzuki Marine Japan: owner’s manual downloads (Japanese) Manual portal suzukimarine.co.jp · JA
Suzuki Marine USA parts & accessories catalog, October 2026 (maintenance kits, filters, plugs, anodes, propellers by model) Parts catalogue assets.suzukimarine.com · PDF · EN
Genuine marine parts & accessories catalogue 2025, Suzuki New Zealand Parts catalogue suzukimarine.co.nz · PDF · EN
DF20A / DF15A / DF9.9B product information with full specifications (2013) Spec sheet assets.suzukimarine.com · PDF · EN
Suzuki outboard catalogue 2025, spec table of all models Brochure globalsuzuki.com · PDF · EN
DF20A product page, Suzuki GB (versions and weights) Product page marine.suzuki.co.uk · EN
Suzuki DIY maintenance videos: oil change, gear oil, plugs, flushing Servicing guide suzukimarine.com · EN

Wear parts & part numbers

Part	OEM number	Also fits	Note
Service kit	`17400-89812`^1,2,3	—	Suzuki’s 100 h / annual kit for all three models from 2013: water pump kit 17400-99J20, oil filter, fuel filter, two MR6K-9 plugs, two anodes, oil drain gasket, gear plug gaskets and O-rings. Engines from 2013–2017 need CPR6EA-9 plugs instead.
Water pump repair kit	`17400-99J20`^1,2,4	—	Impeller, plates and gaskets; Suzuki’s catalogues list the impeller only as part of this kit. The same kit fits the DF9.9A, and dealers list it for the DF8A too.
Engine oil filter	`16510-45H10`^1,2,5,6	—	Same filter as on the earlier DF9.9/15 (2011–2013) and the DF9.9T/TH.
Fuel filter (engine)	`15410-87L00`^1,2	—	Low-pressure filter inside the engine. It cannot be opened or cleaned, only replaced. Also used on the DF25A/30A and DF70A–90A.
Spark plug	`09482-00661`^1,2,7	NGK `MR6K-9`^1,7	Engines from 2018 on; two per engine. This is the plug in the maintenance kit.
Spark plug	`09482-00L04`¹	NGK `CPR6EA-9`¹	Engines from 2013–2017; two per engine. Buy them separately, the maintenance kit contains the newer MR6K-9.
Anode (engine)	`55321-87J01`^1,2	—	Aluminium anode, Suzuki’s alloy for salt and brackish water; two in the maintenance kit.
Drain plug gasket	`09168-12017`^1,2,6	—	Engine oil drain plug washer, aluminium 12 × 17 × 1 mm; fit a new one at every oil change.
Drain plug	`09248-12009`¹	—	Engine oil drain plug.
Gear oil plug gaskets	`59178-97J00`^1,2	—	Two in the maintenance kit, where Suzuki calls them only drain plug gaskets; as the engine oil drain has its own washer, we take them to be for the gear case drain and level screws.
Gear oil	`990A0-01E81-01Q`¹	—	Suzuki ECSTAR hypoid gear oil, 1 US quart, enough for several changes at about 250 ml. Suzuki’s gear lube pump 990C0-99002 fits the bottle and the gear case screws.
Engine oil	`990C0-01E31-GLN`^1,6	—	ECSTAR V7000 10W-40 semi-synthetic (FC-W), 1 US gallon; dealers sell the 1-quart bottle as 990C0-01E30-QUA. Any four-stroke oil API SG or better in 10W-40 or 10W-30 meets the manual.
Propeller hardware kit	`57630-93900`^1,2	—	Spacer, washer, nut and cotter pin. The application chart in the same catalogue shows 57630-93901. Single parts: stopper 57632-94J00, bush 58120-89L00, washer 09160-12066, nut 09141-12005, cotter pin 09204-02004.
Propeller	`58100-89L00-019`^2,8	—	3-blade aluminium, 9-1/4 × 7 in; also fits the DF8A and DF9.9A.
Propeller	`58100-90L41-019`^1,2	—	3-blade aluminium, 9-1/4 × 8 in, thick blade; Suzuki USA lists it for the DF15A and DF20A.
Propeller	`58100-89L20-019`^2,8,1	—	3-blade aluminium, 9-1/4 × 9 in; the thick-blade version is 58100-90L50-019.
Propeller	`58100-89L60-019`^2,8,1	—	3-blade aluminium, 9-1/4 × 10 in; the thick-blade version is 58100-90L60-019.
Propeller	`58100-89L70-019`^1,2,8	—	3-blade aluminium, 9-1/4 × 11 in.
Propeller	`58100-89L50-019`^1,2,8	—	3-blade aluminium, 9-1/4 × 12 in, the highest pitch Suzuki lists for these engines.
High-thrust propeller (4-blade)	`58100-94JA2-019`^2,8	—	10 × 5 in, listed for the DF9.9B; for heavy displacement boats and yacht auxiliaries.
High-thrust propeller (4-blade)	`58100-94JB1-019`^2,8	—	10 × 7 in, listed for the DF15A.
Electric start kit	`31000-89L24`²	—	Electric-start kit for pull-start engines from 2018 (up to 2017: 31000-89L09); it also charges a battery. The engine then needs a different ECM: 33930-89L40 (DF9.9B), 33930-89L00 (DF15A), 33930-89L20 (DF20A), 33930-89L60 (DF20A P40).

Numbers checked against the sources below on 12 October 2026. Always confirm against your serial number and exact type before ordering.

Service intervals

Task	Interval
First service	After the first 20 h or 1 month: change engine oil, oil filter and gear oil; check the fuel system, anodes, idle speed, valve clearance (dealer), propeller nut and all bolts⁷
Engine oil change	Every 100 h or yearly, first time after 20 h⁷
Oil filter	First at 20 h, then every 200 h or yearly (dealer job in the manual)⁷
Gear oil change	Every 100 h or yearly, first time after 20 h⁷
Spark plug	Check, clean and gap every 100 h or yearly; no fixed replacement interval, replace when worn⁷
Fuel filter	Check at 20 h, then every 100 h or yearly; replace every 400 h or 2 years⁷
Raw water impeller	Check every 200 h or yearly; replace every 300 h or 3 years⁷
Thermostat	Check every 100 h or yearly (dealer)⁷
Anode	Check the outer anodes at 20 h, then every 100 h or yearly; the dealer checks the anode inside the powerhead every 100 h or yearly⁷
Timing belt	Check every 200 h or yearly; replace every 800 h or 4 years (dealer)⁷
Valve clearance	Check at 20 h, then every 200 h or yearly, together with idle speed (dealer)⁷
Lubrication	Every 100 h or yearly, first time after 20 h⁷
Propeller	Check propeller, nut and cotter pin at 20 h, then every 100 h or yearly; retighten all nuts and bolts at the same time⁷
Hoses & clamps	Fuel and breather hoses: check at 20 h, then every 100 h or yearly⁷
Battery	Electric-start versions: check battery, wiring, connectors, remote control and power tilt at 20 h, then every 100 h or yearly⁷
Winterising	Before laying up: change engine and gear oil; check plugs, fuel system, anodes, water pump, thermostat and grease points⁷

Hours or months, whichever comes first, from Suzuki’s owner’s manual 99011-89LH0-000 (Japanese edition, 2025); an English edition was not available to compare. Suzuki asks for shorter intervals under hard use: long spells at full throttle or idle, shallow muddy water, or stopping a hot engine without letting it idle first.

Specifications

Type	Four-stroke, SOHC with toothed-belt drive, 4 valves; digital CDI ignition⁹
Injection	Electronic fuel injection that works without a battery, with Suzuki Lean Burn control⁹
Cylinders	2, in line⁹
Displacement	327 cc (20.0 cu in)⁹
Bore × stroke	60.4 × 57 mm⁹
Power	DF20A: 14.7 kW (20 hp) at 5800 rpm; DF15A: 11.0 kW (15 hp) at 5500 rpm; DF9.9B: 7.3 kW (9.9 hp) at 5200 rpm⁹
Full-throttle range	DF20A 5300–6300 rpm, DF15A 5000–6000 rpm, DF9.9B 4700–5700 rpm¹⁰
Cooling	Raw-water cooled: rubber-impeller pump in the gear case, thermostat⁷
Engine oil capacity	1.0 l without filter change, 1.1 l with filter change¹
Engine oil grade	Four-stroke oil API SG or higher, SAE 10W-40 or 10W-30; Suzuki recommends its ECSTAR 10W-40 marine oil (FC-W)⁷
Gear oil capacity	approx. 250 ml (8.4 US fl oz)¹
Gear oil grade	Hypoid gear oil SAE 90, API GL-5, or Suzuki outboard gear oil (ECSTAR)⁷
Spark plug	NGK MR6K-9 on engines from 2018, NGK CPR6EA-9 on 2013–2017 engines; 2 per engine^1,7
Fuel	Unleaded petrol, RON 91 or higher (AKI 87), from a separate portable tank¹⁰
Gearbox	F-N-R dog clutch, 2.08:1; exhaust through the propeller hub, rubber shock hub in the propeller⁹
Shaft length	S 15 in (381 mm), L 20 in (508 mm); the power-tilt T and TH versions are also listed as X 25 in (635 mm)¹⁰
Dry weight	Without propeller and oil: pull start 44 kg (S) / 45 kg (L); electric start 48 / 49 kg; remote control R 47 / 48 kg; DF20AT 52.5 / 54 kg; DF9.9BT 54.5 kg (L); DF20ATH and DF15ATH 55.5 kg (L)⁹
Alternator	12 V / 12 A on the electric-start tiller and power-tilt versions; the 2013 product sheet gives 12 V / 6 A for the DF9.9B and the R versions; pull-start models do not charge (charging kit 32000-89L03 optional)^2,9
Tilt	Manual trim and tilt; power tilt on DF20AT, DF9.9BT, DF20ATH and DF15ATH⁹
Propeller sizes	3-blade aluminium, 9-1/4 in diameter, pitch 7 to 12 in (thick-blade versions in 8, 9 and 10 in); 4-blade high thrust 10 × 5 in (DF9.9B) and 10 × 7 in (DF15A)^2,1
Versions	Tiller, pull start (no suffix); E = tiller, electric start; R = remote control, electric start; T = remote control, power tilt (DF20AT, DF9.9BT); TH = tiller, power tilt (DF20ATH, DF15ATH); S or L at the end = short or long shaft, e.g. DF20AS, DF20AEL, DF20ARL¹¹
Models	The engine number begins with 0995F on the DF9.9B, 01504F on the DF15A and 02002F on the DF20A⁷
Years built	From the 2013 model year, still in production^1,9

Good to know

Check the model year before buying plugs: 2013–2017 engines take NGK CPR6EA-9, engines from 2018 take NGK MR6K-9. The maintenance kit 17400-89812 comes with MR6K-9, so an older engine needs its plugs bought separately.¹
Tell the three apart by the start of the engine number: 0995F is a DF9.9B, 01504F a DF15A, 02002F a DF20A. They share every wear part, so a DF9.9B owner can safely buy kits, filters and anodes sold for the DF20A.^7,1
The engine counts its running hours and shows an oil-change reminder. Reset it after every oil change as the manual’s monitor chapter describes, or the warning keeps coming back.⁷
Look at the old gear oil as it drains: milky oil means water is getting past the propeller shaft or drive shaft seals, so have them replaced before the gears corrode. Refill from the lower screw until oil appears at the upper one, about 250 ml.⁷
The timing belt is due every 4 years or 800 h and is a dealer job. On a used motor older than four years, ask for proof that it has been changed.⁷
Pull-start models do not charge a battery as standard. Suzuki sells a charging kit (32000-89L03) and an electric-start kit that charges as well; the electric-start conversion also needs a different ECM for each model.²

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Sources

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