deafwish wrote:
What other advantages?
Besides the Bravo drives being much stronger, the B3 advantages include:
Better acceleration
Straighter tracking at all speeds due to torque cancellation
Better coupling of horsepower to water (especially over 260hp) for the same prop diameter
Outdrive vs. Engine Mounted Raw-Water Pump – A major disadvantage of the Alpha I is its outdrive mounted raw-water pump. Servicing the pump requires removing the lower-unit of the outdrive. This is fairly easy to do on land, but impossible in the water. It also requires a full change of outdrive oil and is pretty messy. The Bravo (and Volvo) drives use a pully driven pump mounted on the engine. Depending on your engine installation, servicing can still be a nightmare, but at least you don’t have to deal with gear oil or handling an awkward lower unit.
Dog Clutch vs. Cone Clutch – The Alpha I uses a “dog” clutch design for shifting. The dog clutch is known for its reliability, but not for its finesse. Alpha drives go in and out of gear with a pronounced “clunk”. Bravo (and Volvo Penta SX/DP) drives use a “cone” clutch which offers smoother shifting that is perhaps a touch less distinctive to passengers. Either way, the difference is mostly aesthetic and not a big factor on performance.
Also, if you buy a Bravo 1 you can swap a Bravo 3 lower on in the future. Same with a Volvo Penta SX, you can swap in DuoProp lower. You have to swap everything over if you have an Alpha 1.