Suzuki DT2 / DT2.2 two-stroke (1988-1997, premix) service guide
Oil, gear oil, spark plugs and the service schedule for the Suzuki DT2 / DT2.2 two-stroke (1988-1997, premix) (2 to 2.2 hp, two-stroke), from the factory service manual, plus how we service it in Hawaiʻi.
Models covered: DT2, 1988 to 1996: 1 cylinder, 3.05 cu in (50 cc), bore and stroke 1.61 x 1.49 in, 100:1 premix, flywheel magneto ignition, manual start with manual choke. DT2.2, 1997: 1 cylinder, 3.4 cu in (55 cc), 1.61 x 1.50 in, 100:1 premix, Suzuki P.E.I. ignition.
Quick answers
- What two-stroke oil does a Suzuki DT2 / DT2.2 two-stroke use?
- Suzuki CCI oil or an NMMA certified 2-stroke lubricant; if neither is available, use only 2-stroke outboard oil.
- What is the fuel to oil ratio for a Suzuki DT2 / DT2.2 two-stroke?
- 100:1 premix.
- What gear oil does a Suzuki DT2 / DT2.2 two-stroke use, and how much?
- Suzuki Outboard Motor Gear Oil or an equivalent high quality SAE 90 hypoid gear oil. Quantity: 2.4 oz (70 ml), DT2 and DT2.2.
- What spark plug does a Suzuki DT2 / DT2.2 two-stroke use?
- DT2 1988-90: NGK B4H; DT2 1991-96: NGK B5HS; DT2.2 1997: NGK BR5HS. Champion L81 or L88A, all years. Qty 1. Gap: 0.024 to 0.028 in (0.6 to 0.7 mm).
- How often should a Suzuki DT2 / DT2.2 two-stroke be serviced?
- The factory schedule lists: First 10 hours or 1 month; Every 50 hours or 3 months; Every 100 hours or 6 months. 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 DT2 / DT2.2 two-stroke?
- The factory schedule says to inspect it at 50 hours and 100 hours. In Hawaiʻi's warm salt water we replace it every 200 hours or 1 year, whichever comes first, because a worn impeller is the most common cause of overheating.
- What is the idle speed of a Suzuki DT2 / DT2.2 two-stroke?
- DT2: 800 to 900 rpm; DT2.2: 1000 to 1100 rpm.
Maintenance specs
| Two-stroke oil | Suzuki CCI oil or an NMMA certified 2-stroke lubricant; if neither is available, use only 2-stroke outboard oil |
|---|---|
| Fuel to oil mix | 100:1 premix. |
| Gear oil | Suzuki Outboard Motor Gear Oil or an equivalent high quality SAE 90 hypoid gear oil |
| Gear oil quantity | 2.4 oz (70 ml), DT2 and DT2.2. |
| Gear oil drain (fill) plug and oil level plug | Loosen the oil level plug first, then remove the fill (drain) plug at the lower end of the gear housing, then the oil level plug. Check the magnet end of the drain screw for metal. Use new gaskets (washers); install the oil level and vent plugs (if fitted) first, then the fill plug. |
| Lower unit pressure test | 16 to 18 psi of air, submerged or sprayed with soapy water; then 3 to 5 inches of vacuum; hold each for a few minutes |
| Spark plug | DT2 1988-90: NGK B4H; DT2 1991-96: NGK B5HS; DT2.2 1997: NGK BR5HS. Champion L81 or L88A, all years. Qty 1 |
| Spark plug gap | 0.024 to 0.028 in (0.6 to 0.7 mm) |
| Spark plug torque | 10 to 15 ft-lb (14 to 20 N·m) with a new crush washer, or about 1/4 turn to crush the washer. |
| Idle speed | DT2: 800 to 900 rpm; DT2.2: 1000 to 1100 rpm. |
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.
First 10 hours or 1 month
Replace: gear case oil, gear case plug gaskets, propeller cotter pin
Every 50 hours or 3 months
Replace: gear case oil, gear case plug gaskets, propeller cotter pin
Check: spark plugs, water pump impeller, anodes
Every 100 hours or 6 months
Replace: gear case oil, gear case plug gaskets, propeller cotter pin
Check: spark plugs, water pump impeller, anodes
Every 200 hours or 1 year (our Hawai‘i yearly service) Hawai‘i
Replace: gear case oil, gear case plug gaskets, propeller cotter pin, water pump impeller
Check: spark plugs, anodes
We replace the water pump impeller at every service from 200 hours up, which can be sooner than the factory schedule, because of Hawaiʻi’s warm salt water.
Source: Suzuki DT 2 to 225 hp two-stroke outboards service manual. Specs can change by model year and serial number, so always confirm your exact model from the serial tag on the clamp bracket.