Replace the shear pin.
$1000
398lbs +prop and oil,gear lube 446lbs
The 90 hp Johnson outboard is not shipped with a propeller installed. The correct size is determined, and installed, when the engine is rigged on the boat.
A 4 hp Mercury outboard, produces a true 4 hp, rated at the prop.
Sometimes the center of the prop breaks loose and slips or the splines get stripped. Also check to make sure you have the correct pitch prop for that motor and it is fastened securely.
In neutral, the propeller shaft is not engaged with any other part of the motor so the prop will spin freely. You'll often see this when a boat is being towed down the highway - the prop is spinning the same as a windmill does in the wind. It's best to let it spin cause if you put the motor in gear and the prop hits something, such as your driveway while you're going in or out of your yard, there is no give and you could damage your prop or worse, the gears inside.
401.2 without prop
Sure! So will a trolling motor. Maybe not as fast as you'd like, but as long as you keep the prop out of the weeds, you'll move.
right behind the prop, on the same shaft
It all depends on your boat first and the actual skiers to a lessor degree. If you have smaller ski or fishing boat (19' or shorter), then that is more than enough power to pull whatever or whoever you want to with it. I am 6'1" and stocky in my earlier days, but I have skied behind a 17' bass boat with a 70 hp outboard pretty effortlessly. If your boat is 20' or larger, then it comes down to the weight of your boat, the type of prop you have, etc. and it is less likely that you will be skiing much with that boat/motor combination. **Worse case, try it... You will either pull the skiier up, or not. Remember too that you can change your prop to a power take off prop that will give you more BITE from a dead stop for this situation, but takes a little of your top end speed away.
change the prop pitch nah done that. its to do with the engine.
The propeller size on an outboard engine, is dependant on the application. The size of the boat, and more particularly the weight it will carry, determines the propeller size.