Mercury 300CXL SeaPro Commercial AMS – Specifications
| Feature | Description |
|---|---|
| Model | Mercury 300CXL SeaPro Commercial AMS |
| Engine Type | V8 4-Stroke, 32-valve, Dual Overhead Cam (DOHC) |
| Horsepower | 300 HP @ 5600?6400 RPM |
| Displacement | 4.6 Liters (279 cu in) |
| Fuel System | Electronic Fuel Injection (EFI) |
| Starting System | Electric Start (Smart Start) |
| Steering | Advanced MidSection (AMS) ? compatible with Digital Electric Steering |
| Shaft Length | 25 inches (CXL – Extra Long) |
| Gear Shift | Digital Throttle & Shift (DTS) |
| Gear Ratio | 1.75:1 |
| Alternator Output | 115 Amps (Idle: 20 Amps) |
| Cooling System | Water-cooled with thermostat |
| Exhaust System | Through Propeller |
| Dry Weight | 600 lbs (272 kg) |
| Trim & Tilt | Power Trim and Tilt |
| Fuel Type | Unleaded Gasoline (Minimum 87 AKI / 91 RON) |
| Oil Type | Mercury SAE 10W-30 4-Stroke Marine Engine Oil |
| Use Case | Commercial operations, large boats, patrol & utility vessels |
| Special Features | Advanced corrosion protection, SmartCraft compatible, robust components |
| Warranty | 2-Year Commercial Limited Warranty |
| Certifications | EPA, CARB 3-Star, CE, ISO, IMO |












Zeke Nash (verified owner) –
Flawless marine engine. Clearly brand new and authentic. Trust IDMTB’s sourcing.
Xyla Perry (verified owner) –
Authentic boat engine as promised. IDMTB is a highly trustworthy dealer.
Penn Howard (verified owner) –
Best customer service I’ve encountered when buying a large boat engine.
Gideon Smith (verified owner) –
Crating was robust and secure. The boat motor arrived in pristine condition.
Nico Young (verified owner) –
Outstanding support from IDMTB! They answered all my technical questions patiently.
Summer Irwin (verified owner) –
IDMTB confirmed my boat engine warranty status instantly. Excellent follow-up.
Ophelia Zimmer (verified owner) –
Exceptional service and attention to detail from everyone at IDMTB. Great purchase!
Kellan Allen (verified owner) –
Truly amazing support from IDMTB. They were responsive via email within minutes.
Cade Reed (verified owner) –
IDMTB offers fantastic customer service! Quick responses and very helpful staff. Highly recommend.