Engines

Mercury Racing 540 Replacing 525 EFI
The 540 is a development of the 520 engine, with headers added to boost exhaust efficiency and horsepower.
The Outboard Expert: Yamaha Reveals Second-Generation F115 Outboard
A replacement for the original Yamaha F115 outboard that put four-strokes on the map is lighter, more powerful, and more sophisticated than ever.
Volvo Penta Turns 350
And the company continues to expand its line of V8 gasoline stern-drive powerplants.
Yamaha Four Stroke Outboard Fuel Filters 101
Do you know how to change the fuel filter on a Yamaha four-stroke outboard? Do you know where the internal filters are located? A Yamaha tech walks us through fuel filter maintenance on a four-stroke.
Outboard Mounting Hardware: Stainless or Galvanized?
Factories are using stainless bolts and nuts to mount outboards. These fasteners need to be carefully installed to prevent crevice corrosion.
The Outboard Expert: Mercury Marine and Lehr Outboards Headline the Miami Boat Show
Mercury introduces a new model and some colorful options, while Lehr propane outboards ups the ante with a 15-hp model.
Basic Troubleshooting When Your Outboard Won’t Start
Don't get stuck at the boat ramp - fix your outboards fast, with these basic troubleshooting tips.
How Trim Affects a Powerboat
Wondering how changing an outboard or trim tab's trim position affects your boat? We'll demonstrate both fore and aft and lateral changes, while trimming a twin outboard powerboat.
Firefighting in the Engine Compartment
If your boat has an access hole into the engine compartment for fire-fighting with a portable extinguisher, be sure to have the right type and the right nozzle.
Torqeedo Deep Blue Outboard and Hybrid: Electrifying Power
By adding hybrid technology, Torqeedo aims to boost the reach of low-impact propulsion.

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