Speedy 3's and 3A's
08-13-2004, 02:41 PM
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Location: Chapin (Lake Murray), South Carolina
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Re: Speedy 3's and 3A's
III-A SSM
The III-A Super Speed Master (SSM) drive is a veteran of Mercury Racing drive stable. An updated version of the Mercury Racing III SSM drive, the III-A SSM drive features larger vertical bearings in the upper housing. The larger bearings provide increased rigidity for the driven gear, resulting in increased bearing capacity and longer life. Larger driveshaft splines provide greater strength, while larger pinion bearings hold lower bevel gears more rigidly, resulting in increased bearing life. A larger propeller shaft increases drive strength and is rear loading for improved shaft contact with the propeller. An extended “nose” on the gearcase improves water flow and boat handling.
Features & Benefits
Large driveshaft splines provide greater torsional strength.
Large vertical bearing in the upper housing provide increased rigidity for the driven gear and longer life.
Large pinion bearings hold lower level gears more rigidly resulting in increased bearing life.
Large propeller shaft is rear loading for improved shaft contact with the propeller.
Input ratings are 750 HP and up to 750 foot pounds of torque.
Extended nose on the gearcase improves water flow and boat handling.
Drive-line and plug-in models available.
Transmission required.
Counter rotation models available for multiple engine applications.
Gear ratios: (RH or LH) 1:1, 1.18:1, 1.33:1, 1.48:1 or 1.62:1.
The way to tell the difference is the lll's have a 19 spline propshaft and they llla"s have 26.
The llla's would be the best to get. While they are rated at 750 HP they will handle more. I have a friend running 1000HP through lllA's on a conventional topgun and he has rebuilt 1 drive in 4 years. It all depends on how much you keep them in the water
The III-A Super Speed Master (SSM) drive is a veteran of Mercury Racing drive stable. An updated version of the Mercury Racing III SSM drive, the III-A SSM drive features larger vertical bearings in the upper housing. The larger bearings provide increased rigidity for the driven gear, resulting in increased bearing capacity and longer life. Larger driveshaft splines provide greater strength, while larger pinion bearings hold lower bevel gears more rigidly, resulting in increased bearing life. A larger propeller shaft increases drive strength and is rear loading for improved shaft contact with the propeller. An extended “nose” on the gearcase improves water flow and boat handling.
Features & Benefits
Large driveshaft splines provide greater torsional strength.
Large vertical bearing in the upper housing provide increased rigidity for the driven gear and longer life.
Large pinion bearings hold lower level gears more rigidly resulting in increased bearing life.
Large propeller shaft is rear loading for improved shaft contact with the propeller.
Input ratings are 750 HP and up to 750 foot pounds of torque.
Extended nose on the gearcase improves water flow and boat handling.
Drive-line and plug-in models available.
Transmission required.
Counter rotation models available for multiple engine applications.
Gear ratios: (RH or LH) 1:1, 1.18:1, 1.33:1, 1.48:1 or 1.62:1.
The way to tell the difference is the lll's have a 19 spline propshaft and they llla"s have 26.
The llla's would be the best to get. While they are rated at 750 HP they will handle more. I have a friend running 1000HP through lllA's on a conventional topgun and he has rebuilt 1 drive in 4 years. It all depends on how much you keep them in the water
