This page lists the propeller sizes Suzuki prints for each outboard family, the full-throttle rpm range each model must reach, and the propeller nut torque and hardware order for fitting one. Sizes are copied from Suzuki's set-up and service manuals as printed: blades × diameter × pitch, in inches. The rule for choosing between them is Suzuki's: select a propeller that lets the engine reach the recommended operating range at full throttle with the maximum boat load. How to test that with a tachometer, and how to move pitch up or down, is on our full-throttle RPM range and propeller guide.
How to read the chart
- 3 × 10 1/4 × 11 means three blades, 10 1/4 in diameter, 11 in pitch. Pitch is the number that changes rpm: the owner's manuals say smaller loads generally require larger-pitch propellers and larger loads smaller-pitch propellers.
- Right-hand vs left-hand: standard lower units turn a right-hand (R) propeller. From the DF100A/DF115A/DF140A up, the set-up manuals also list left-hand (L) propellers for counter-rotation lower units; the letter follows the size on the prop. Install a right-hand propeller with a regular-rotation lower unit, or a left-hand propeller with a counter-rotation lower unit, never the other way.
- DF300B/DF350A run two contra-rotating propellers, front and rear, marked F or R at the end of the size code (example from the manual: 3X15-1/2X25.5F).
- Where a chart lists more than one model, the manual does not always say which sizes belong to which model; we note that where it applies. A prop with either too much or too little pitch gives an incorrect maximum engine speed and can severely damage the motor.
Propeller sizes and full-throttle range by family
| Family | Full-throttle operating range | Propeller sizes as printed (blades × dia × pitch, in) | Source |
|---|---|---|---|
| DF2.5 | 5250–5750 r/min | 3 × 188 mm (7-3/8 in) × 115 mm (4-1/2 in) (A400, base manual); 3 × 188 mm (7-3/8 in) × 135 mm (5-3/8 in) (A510 shear-pin type; A520 later spline drive rubber hub type). The owner's manual notes there are two types of lower unit needing different propellers. | Service manual 99500-97J01-01E; owner's manual |
| DF4A / DF6A | DF4A 4000–5000; DF6A 4750–5750 r/min | The DF4A/DF6A owner's manual prints no size list. The DF4/DF5/DF6 service manual lists 3 × 7-1/2 × 6 (C601), 3 × 7-1/2 × 6-1/2 (C611), 3 × 7-1/2 × 7 (C701), with DF4 4000–5000 and DF5 4500–5500 r/min. | Owner's manual 99011-97L60-03B; service manual 99500-91J03-01E |
| DF8A / DF9.9A | DF8A 4700–5700; DF9.9A 5200–6200 r/min | 3 × 9 1/4 × 7, 8, 9, 10, 11 | Service manual 99500-99J00 |
| DF9.9B / DF15A / DF20A | DF9.9B 4700–5700; DF15A 5000–6000; DF20A 5300–6300 r/min | 3 × 9 1/4 × 7, 8, 9, 10, 11; the 2018 specification adds 3 × 9 1/4 × 12 and 4 × 10 × 7 | Service manual 99500-89L00-01E |
| DF25A / DF30A | DF25A 5000–6000; DF30A 5300–6300 r/min | 3 × 10 1/4 × 9, 10, 11, 12, 13, 14, 15 | Service manual 99500-94L10-01E; set-up manual 99505-94L10-01E |
| DF40A / DF50A / DF60A (standard gearcase) | DF40A, DF40AS/ASV 5000–6000; DF50A/AV, DF60A/AV 5300–6300 r/min | 3 × 11 1/2 × 9; 3 × 11 1/2 × 10; 3 × 11 1/2 × 11; 3 × 11 5/8 × 12; 3 × 11 1/2 × 13; 3 × 11 3/8 × 14; 3 × 11 1/4 × 15; 3 × 11 1/8 × 16; 3 × 11 × 17 | Set-up manual 99505-88L40-01E |
| DF40ASV / DF50AV / DF60AV (AV models) | DF40ASV 5000–6000; DF50AV, DF60AV 5300–6300 r/min | 3 × 14 × 9; 3 × 14 × 11; 3 × 13 3/4 × 12; 3 × 14 × 13; 3 × 13 7/8 × 15; 3 × 13 3/4 × 17 | Set-up manual 99505-88L40-01E |
| DF70A / DF75 / DF80A / DF90A / DF100B | DF70A, DF75, DF80A 5000–6000; DF90A 5300–6300; DF100B 5700–6300 r/min | 3 × 13 1/2 × 15; 3 × 13 7/8 × 15; 3 × 13 3/4 × 17, 19, 21, 23; 3 × 14 × 13, 17, 19, 21, 23. The chart's split between models is not legible in our copy. | Set-up manual 99505-87L50-01E; owner's manual for DF75 |
| DF100A / DF115A / DF140A | DF100A, DF115A, DF115AS 5000–6000; DF140A 5600–6200 r/min | Right-hand: 3 × 13 1/2 × 15; 3 × 14 × 17, 19, 21, 23; 3 × 14 1/4 × 18, 20, 22, 24. Left-hand: 3 × 14 1/4 × 18, 20, 22, 24. The service manual also lists right-hand 3 × 13 7/8 × 15, 17, 19, 21, 23, 25 and left-hand 3 × 13 7/8 × 17, 19, 21, 23. Not separated by model. | Set-up manual 99505-92J20-01E; service manual 99500-92J00-01E |
| DF100C / DF115B / DF140B | DF100C, DF115B 5000–6000; DF115BS, DF140B 5700–6300 r/min | Right-hand: 3 × 13 1/2 × 15; 3 × 14 × 17, 19, 21, 23; 3 × 13 7/8 × 15, 17, 19, 21, 23, 25. Left-hand: 3 × 13 7/8 × 17, 19, 21, 23. Not separated by model. | Set-up manual 99505-99L40-01E |
| DF150A / DF175A / DF200A (and AP) | DF150A, DF150AP 5000–6000; DF175A, DF200A, DF200AS, DF175AP, DF200AP 5500–6100 r/min | Right-hand: 3 × 16 × 15, 17, 18 1/2, 20, 21 1/2, 23, 24 1/2, 26, 27 1/2; 3 × 15 1/2 × 17; 3 × 15 1/4 × 19; 3 × 15 × 21; 3 × 14 3/4 × 23; 3 × 14 1/2 × 25; 3 × 14 1/2 × 27; 4 × 15 1/4 × 18, 20, 22, 24, 26. Left-hand: 3 × 16 × 17, 18 1/2, 20, 21 1/2, 23, 24 1/2, 26; 3 × 15 1/2 × 17; 3 × 15 1/4 × 19; 3 × 15 × 21; 3 × 14 3/4 × 23; 3 × 14 1/2 × 25; 3 × 14 1/2 × 27; 4 × 15 1/4 × 20, 22, 24, 26. The AP set-up manual also prints 3 × 15 × 19, 3 × 14 7/8 × 21, 3 × 14 1/2 × 23, 3 × 14 1/4 × 25 and 3 × 14 × 27, in a column our copy cannot place. | Set-up manuals 99505-96L60-01E and 99505-96L70-01E |
| DF225 / DF250 | DF225 5000–6000; DF250 5500–6100 r/min | No size list in the manuals we have. | Owner's manual 99011-93JL0-03B |
| DF250AP / DF300AP | DF250AP 5500–6100; DF300AP 5700–6300 r/min | Same right-hand and left-hand lists as the DF150A–DF200A above (3 × 16 × 15 through 27 1/2, the 15 1/2 to 14 1/2 diameters, and the 4 × 15 1/4 series). | Set-up manual 99505-98J40-01E |
| DF300B / DF325A / DF350A (dual prop) | DF300B, DF300BMD, DF325A 5300–6300; DF350A, DF350AMD 5700–6300 r/min | 3 × 15 1/2 × 12, 15, 16.5, 18, 19.5, 21, 22.5, 24, 25.5, 27, 28.5, 30, 31.5. Front and rear propellers must have the same number of blades, diameter and pitch. | Set-up manual 99505-98L40-01E |
Propeller nut torque by family
Owners get the owner's-manual figure. Where the set-up or service manual prints a single value instead of a range, it is noted; do not average them. The hardware order is what goes on the shaft after the propeller, in the manual's order.
| Family | Owner's manual torque | Set-up / service manual torque | Hardware order on the shaft |
|---|---|---|---|
| DF2.5 | Not printed; "make sure that the propeller nut is tightened" | Not printed | Stopper, propeller, nut, cotter pin (spline-hub type; earlier shear-pin props use the shear pin and cotter pin only) |
| DF4A / DF6A | Not printed | Not printed (DF4/DF5/DF6 manual) | Stopper, propeller, nut, cotter pin |
| DF8A / DF9.9A | 16–20 N·m (1.6–2.0 kg-m / 12–14 lb-ft) | 18 N·m (1.8 kgf-m, 13.0 lbf-ft) | Stopper, propeller, washer, nut, cotter pin |
| DF9.9B / DF15A / DF20A | 16–20 N·m (1.6–2.0 kgf-m / 12–15 lb-ft) in the 2020 manual; 12–14 lb-ft as printed in 2014 | 18 N·m (1.8 kgf-m, 13.0 lbf-ft) | Stopper, propeller, washer, nut, cotter pin |
| DF25A / DF30A | 20–30 N·m (2.0–3.0 kg-m / 14.5–21.5 lb-ft) | 25 N·m (2.5 kgf-m, 18.0 lbf-ft) | Stopper, propeller, spacer, washer, nut, cotter pin |
| DF40A / DF50A / DF60A | 50–60 N·m (5.1–6.1 kgf-m / 37–44 lbf-ft) | 55 N·m (5.6 kgf-m, 41 lbf-ft) set-up; 55 N·m (5.5 kgf-m, 40.0 lbf-ft) service | Stopper, propeller, spacer, washer, nut, cotter pin |
| DF70A / DF75 / DF80A / DF90A / DF100B | 50–60 N·m (5.1–6.1 kgf-m / 37–44 lbf-ft) | 55 N·m (5.5 kgf-m) set-up; 55 N·m (5.5 kgf-m, 40.0 lbf-ft) service | Stopper, propeller, spacer, washer, nut, cotter pin |
| DF100A / DF115A / DF140A | 50–60 N·m (5.0–6.0 kg-m / 36.0–43.5 lb-ft) | 55 N·m (5.5 kgf-m) set-up; 55 N·m (5.5 kgf-m, 40.0 lbf-ft) service | Stopper, propeller, spacer, washer, nut, cotter pin |
| DF100C / DF115B / DF140B | 50–60 N·m (5.1–6.1 kgf-m / 37–44 lbf-ft) | 55 N·m (5.6 kgf-m, 41 lbf-ft) | Stopper, propeller, spacer, washer, nut, cotter pin |
| DF150A / DF175A / DF200A and AP | 50–60 N·m (5.1–6.1 kgf-m / 37–44 lbf-ft) | 55 N·m (5.5 kgf-m); AP manual prints 40 lbf-ft | Stopper, propeller, spacer, washer, nut, cotter pin |
| DF225 / DF250 | 50–60 N·m (5.1–6.1 kgf-m / 37–44 lbf-ft) | Not in the manuals we have | Stopper, propeller, spacer, washer, nut, cotter pin |
| DF250AP / DF300AP | 50–60 N·m (5.1–6.1 kgf-m / 37–44 lbf-ft) | 55 N·m (5.5 kgf-m, 40 lb-ft) | Stopper, propeller, spacer, washer, nut, cotter pin |
| DF300B / DF350A front propeller | 125–135 N·m (13–14 kgf-m / 92–100 lbf-ft), left-hand thread | 130 N·m (13 kgf-m, 96 lbf-ft) | Front stopper, front propeller, front nut spacer, nut stopper, front nut (bent stopper tabs) |
| DF300B / DF350A rear propeller | 50–60 N·m (5.1–6.1 kgf-m / 37–44 lbf-ft) | 55 N·m (5.6 kgf-m, 41 lbf-ft) | Rear stopper, rear propeller, spacer, washer, nut, cotter pin |
Fitting a propeller the manual's way
- Shift into Neutral and remove the emergency stop switch lock plate so the motor cannot be started accidentally.
- Wear gloves, and lock the propeller by placing a block of wood between the blades and the anti-cavitation plate before loosening or tightening the nut.
- Coat the propeller shaft splines liberally with Suzuki water resistant grease to help prevent corrosion.
- Place the stopper on the shaft, align the propeller with the splines and slide it on, then the spacer (where fitted) and washer.
- Tighten the propeller nut with a torque wrench to the figure for your family.
- Align the grooves in the nut with the hole in the shaft, insert the cotter pin and bend the ends over to lock it. Removal is the reverse.
The service manuals have the propeller, nut and cotter pin inspected initially after 20 hours (1 month) and every 100 hours (12 months): a bent or worn propeller, worn or damaged bush splines, and a slipping rubber bush all call for repair or replacement. Our torque spec chart has the rest of the fasteners.
Counter-rotation propellers
On the DF150AP/175AP/200AP and DF250AP/300AP the lower unit can be used for either regular or counter rotation without being changed: the motor ships as regular rotation, and rotation is set by a rotation select connector, a blue connector labeled REGULAR or a white one labeled COUNTER. Right-hand propellers are identified with the letter R after the size on the propeller. Fit the propeller that matches the rotation, as above. On the other families a counter-rotation lower unit is a separate model; check your model code before ordering a left-hand prop.
Dual propellers on the DF300B and DF350A
The front propeller nut is a left-hand thread and needs the Suzuki "Propeller nut remover & installer" (special tool 09923-29810 in the set-up manual); it is secured by bending the front propeller nut stopper, not a cotter pin. The owner's manual sequence:
- Grease the splines; place the front propeller stopper on the shaft and slide on the front propeller.
- Place the front propeller nut spacer and the front propeller nut stopper on the shaft, aligning section A of the stopper with the punch mark C on the spacer (the set-up manual describes this as the stopper's circular tab sitting in the groove with the circle mark).
- Tighten the front nut (left-hand thread) to 125–135 N·m (13–14 kgf-m / 92–100 lbf-ft) with the tool, then bend two sections of the stopper's locking edge to the nut. Do not bend sections A and B.
- Place the rear propeller stopper, slide on the rear propeller, then the rear nut spacer and washer.
- Tighten the rear nut to 50–60 N·m (5.1–6.1 kgf-m / 37–44 lbf-ft), align the nut grooves with the shaft hole, fit the cotter pin and bend it.
To remove, straighten the locking edges on the front nut stopper before turning the front nut. Confirm the size of both propellers when installing: front and rear must be the same number of blades, diameter and pitch.
Propellers and hardware
Boat Max Online is an authorized Suzuki, Honda and Yamaha Marine dealer with free shipping on orders over $149 to the lower 48. Shop genuine Suzuki propellers, propeller nuts, washers, spacers and cotter pins, and OEM prop parts. We also sell complete Suzuki outboards up to 30 hp.
Sources: Suzuki owner's manuals for DF2.5, DF4A/DF6A, DF8A/DF9.9A, DF9.9B/DF15A/DF20A, DF25A/DF30A, DF40A–DF60A, DF75/DF90A, DF100A–DF140A, DF115B/DF140B, DF150A–DF200A, DF150AP–DF200AP, DF225/DF250, DF250AP/DF300AP and DF300B/DF350A; Suzuki set-up manuals 99505-88L40-01E, 99505-87L50-01E, 99505-92J20-01E, 99505-99L40-01E, 99505-96L60-01E, 99505-96L70-01E, 99505-98J40-01E, 99505-98L40-01E and 99505-94L10-01E; Suzuki service manuals 99500-97J01-01E, 99500-91J03-01E, 99500-99J00, 99500-89L00-01E, 99500-94L10-01E, 99500-88L01-01E, 99500-87L10-01E and 99500-92J00-01E. Figures are Suzuki's published values; confirm against the manual for your model year and serial number.