Can a 2025 Ram 1500 tow a Key West 239 FS?
It depends on the engine
We estimate a loaded Key West 239 FS on its trailer at about 5,490 lb. 5 of 6 1500 engine/package options pass with a 20% margin (for example the 3.6L Pentastar eTorque V6, 3.55 axle). 1 is borderline (caution).
Check your exact setup (add your door-sticker payload and real trailer weight)
Key West 239 FS loaded towing weight
| Weight (Key West) | 2,700 lb |
| Engine: Yamaha 4.2L V6 F225-F300 (heaviest listed variant), the heaviest Yamaha that covers the boat's 300 HP max | 588 lb |
| Fuel: 100 gal x 6.1 lb/gal (full tank) | 610 lb |
| Gear allowance: 10% (batteries, anchor, coolers, safety gear, T-top/options) | 390 lb |
| Trailer: ESTIMATE, 35% of boat + engine (no trailer weight published) | 1,200 lb |
| Estimated loaded trailer weight | 5,490 lb |
2025 Ram 1500 towing ratings vs this boat
| Engine / package | Published rating (lb) | Tow | Payload | Result |
|---|---|---|---|---|
| 3.6L Pentastar eTorque V6, 3.21 axle | 6,370–6,720 | CAUTION | PASS | CAUTION |
| 3.6L Pentastar eTorque V6, 3.55 axle | 7,370–8,480 | PASS | PASS | PASS |
| 3.0L Hurricane (SO), 3.21 axle | 8,380–8,470 | PASS | PASS | PASS |
| 3.0L Hurricane (SO), 3.55 axle | 8,160–8,350 | PASS | PASS | PASS |
| 3.0L Hurricane (SO), 3.92 axle | 11,260–11,550 | PASS | PASS | PASS |
| 3.0L Hurricane H.O. (RHO / Limited) | 8,380–9,920 | PASS | PASS | PASS |
"Published rating" is the lowest–highest conventional (ball-hitch) rating Ram prints for that engine/package across cab, bed, drive and axle choices. PASS means the loaded trailer is at or under 80% of the lowest rating. Ram: ratings include 300 lb of passengers; trailer weight and payload ratings are mutually exclusive; weight distribution recommended over 5,000 lb; Class IV receiver tongue limit 1,100 lb.
Tongue weight vs payload
Tongue weight should be 10–15% of the loaded trailer: about 549–824 lb. That comes out of your truck's payload along with everyone in the cab, so with two adults (300 lb) you need roughly 849–1,124 lb of payload before any cargo in the bed.
3.6L Pentastar eTorque V6, 3.21 axle CAUTION
CAUTION 5,490 lb is within the 6,370 lb rating but uses 86% of it, which leaves less than our 20% safety margin.
PASS Needs about 849-1,124 lb of payload; the lowest published payload for this engine is 1,190 lb.
PASS Max tongue weight for this truck/hitch is 1,100 lb.
Lowest payload (1,190 lb) is the HFE model.
3.6L Pentastar eTorque V6, 3.55 axle PASS
PASS 5,490 lb is 74% of the lowest published rating (7,370 lb), inside a 20% safety margin.
PASS Needs about 849-1,124 lb of payload; the lowest published payload for this engine is 1,190 lb.
PASS Max tongue weight for this truck/hitch is 1,100 lb.
Lowest payload (1,190 lb) is the HFE model.
3.0L Hurricane (SO), 3.21 axle PASS
PASS 5,490 lb is 66% of the lowest published rating (8,380 lb), inside a 20% safety margin.
PASS Needs about 849-1,124 lb of payload; the lowest published payload for this engine is 1,790 lb.
PASS Max tongue weight for this truck/hitch is 1,100 lb.
3.0L Hurricane (SO), 3.55 axle PASS
PASS 5,490 lb is 67% of the lowest published rating (8,160 lb), inside a 20% safety margin.
PASS Needs about 849-1,124 lb of payload; the lowest published payload for this engine is 1,790 lb.
PASS Max tongue weight for this truck/hitch is 1,100 lb.
3.0L Hurricane (SO), 3.92 axle PASS
PASS 5,490 lb is 49% of the lowest published rating (11,260 lb), inside a 20% safety margin.
PASS Needs about 849-1,124 lb of payload; the lowest published payload for this engine is 1,790 lb.
PASS Max tongue weight for this truck/hitch is 1,100 lb.
3.0L Hurricane H.O. (RHO / Limited) PASS
PASS 5,490 lb is 66% of the lowest published rating (8,380 lb), inside a 20% safety margin.
PASS Needs about 849-1,124 lb of payload; the lowest published payload for this engine is 1,340 lb.
PASS Max tongue weight for this truck/hitch is 1,100 lb.
RHO 8,380 lb; Limited 9,340-9,920 lb.
Confirm with your door-jamb sticker and owner's manual. Your exact truck's rating depends on cab, bed, drive, axle ratio, options and tires, and your boat's real weight depends on its engine, options, fuel and gear. When in doubt, weigh the rig at a CAT scale.
Gear you may need
Placeholder links (not affiliate links yet). Disclosure.
Trailer brake controller
Boat trailers over about 3,000 lb usually need working trailer brakes (check your state's law); an electric-over-hydraulic or electric setup needs a controller in the truck.
Class IV receiver hitch & ball mount
Match the ball mount drop to your trailer so the boat rides level; the hitch rating must cover the full loaded trailer.
Tongue weight scale
The only way to know your real tongue weight (10-15% of the loaded trailer) before it eats your payload.
Sources
- 2025 Ram 1500: Ram 2025 Ram 1500 Payload & Towing Weight Capacities sheet (SAE J2807), checked 2026-10-29
- Key West 239 FS: Key West model page (Weight, fuel capacity, max HP), checked 2026-10-29
- Engine weight: Yamaha Outboards spec page (Yamaha 4.2L V6 F225-F300 (heaviest listed variant), 588 lb)
- Method and assumptions: How we calculate
Related checks
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