Boat CS2 Transmission

New Boat CS2 Transmission

Lenco Boat Transmissions

For more specific information on any of these Lenco transmissions or transmission parts and components please refer to the Tabs below, or call our tech line at (909) 673-9080.

         

 

 

Lenco CS2 boat transmission readily couples to most V-drive propulsion systems.  Choose which specific transmission design is best for your needs  (CS1. CS2, CS3 or CS4) then choose your ratios. Call our tech line (909) 673-9080, and enter a whole new world of power control and application.
 
Lenco’s boat transmissions feature ultra durable double sprags for consistently reliable hard off-idle launches.
Boat clutch comes in two different styles:
Small: comes w/the small blue clutches (5.5" dia.).
Large: comes w/the large blue clutches (6.75" dia.).
The large is recommended for blown alcohol or top fuel boats and all heavy duty applications.

All units come with the following:
Input shaft.
Low drag angular contact & needle bearing.
Choice of ratio.
Air servos or max adjust shift towers.
Choice of output spline (16 or 32)  & length.
Note: All units with transmissions come with M-50 Sprags standard.

CS1
1" Gear Set.
Light weight components throughout (except ring gears).
Low drag angular contact and needle bearings.
Choice of ratio.
Air servo or max-adjust shift towers.
Choice for output length and spline (16 or 32).
Neutral if requested.
Input shaft.
Throwout bearing collar (4 and 5 speed only).
 

CS2
3/4" Gear Set.
Light weight components.
Light weight ring gears (units w/27 and 32 spline shafts only).
Low drag (angluar contact and needle bearings).
Choice of ratio.
Choice of standard or new generation reverses.
Air servos or max-adjust shift towers.
Input shaft.
Throwout bearing collar (4 & 5-speed only).
Shifters and lockouts can be either style.
 

CS3
1/2" Gear Set.

Light weight components.
Light weight ring gears (units w/27 and 32 spline shafts only.
Low drag (angular contact and needle bearings.
Choice of ratio.
New generation reverse w/neutral.
Air servos or max-adjust shift towers.
Input shaft.
Throwout bearing collar (4 & 5 speed only).
Choice of shifter style and lockout style.

CS1 Gears 1"

1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear.
1.28% - Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear.
1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear.
1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear.
1.37% - Uses 26 tooth planet gears, a 31 tooth sun gear and a 83 tooth ring gear.
1.41% - Uses 24 tooth planet gears, a 34 tooth sun gear and a 83 tooth ring gear.
1.44% - Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear.
1.44% - Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear.
1.46% - Uses 22 tooth planet gears, a 37 tooth sun gear and a 80 tooth ring gear.
1.48% - Uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear.
1.50% - Uses 17 tooth planet gears, a 34 tooth sun gear and a 68 tooth ring gear.
1.56% - Uses 16 tooth planet gears, a 41 tooth sun gear and a 73 tooth ring gear.
1.68% - Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear.
 

CS2 Gears 3/4"

1.16% Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear.
1.19% Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.
1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.
1.21% Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear.
1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear.
1.23% Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear.
1.24% Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear.
1.20% Uses 40 tooth planet gears, a 21 tooth sun gear and a 102 tooth ring gear.
1.22% Uses 38 tooth planet gears, a 22 tooth sun gear and a 98 tooth ring gear.
1.25% (Small shaft gearset) Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear.
1.25% (Large shaft gearset) Uses 36 tooth planet gears, a 25 tooth sun gear and a 98 tooth ring gear.
1.28% Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear. 
1.31% Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear.
1.35% Uses 26 tooth planet gears, a 28 tooth sun gear and an 80 tooth ring gear.
1.38% Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear.
1.41% Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear.
1.44% Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear.
1.46% Uses 22 tooth planet gears, a 37 tooth sun gear and an 80 tooth ring gear.
1.48% Uses 22 tooth planet gears, a 40 tooth sun gear and a 83 tooth ring gear.
1.50% Uses 22 tooth planet gears, a 44 tooth sun gear and an 88 tooth ring gear.
1.56% Uses 22 tooth planet gears, a 55 tooth sun gear and a 98 tooth ring gear.
1.68% Uses 15 tooth planet gears, a 62 tooth sun gear and 91 tooth ring gear.
1.73% Uses 14 tooth planet gears, a 76 tooth sun gear and 104 tooth ring gear.
 

CS3 Gears 1/2"

1.16% Uses 21/36 tooth planet gears, a 22 tooth sun gear and a 79 tooth ring gear.
1.19% Uses 21/33 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.
1.20% Uses 22/32 tooth planet gears, a 22 tooth sun gear and a 76 tooth ring gear.
1.21% Uses 21/31 tooth planet gears, a 24 tooth sun gear and a 76 tooth ring gear.
1.22% Uses 21/30 tooth planet gears, a 24 tooth sun gear and a 75 tooth ring gear.
1.23% Uses 21/30 tooth planet gears, a 25 tooth sun gear and a 76 tooth ring gear.
1.24% Uses 26/31 tooth planet gears, a 23 tooth sun gear and an 80 tooth ring gear.
1.256% Uses 32 tooth planet gears, a 22 tooth sun gear and a 86 tooth ring gear.
1.280% Uses 27 tooth planet gears, a 21 tooth sun gear and a 75 tooth ring gear.
1.297% Uses 26 tooth planet gears, a 22 tooth sun gear and a 74 tooth ring gear.
1.313% Uses 27 tooth planet gears, a 25 tooth sun gear and an 80 tooth ring gear.
1.338% Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear.
1.356% Uses 23 tooth planet gears, a 26 tooth sun gear and a 73 tooth ring gear.
1.368% Uses 21 tooth planet gears, a 25 tooth sun gear and an 74 tooth ring gear.
1.378% Uses 23 tooth planet gears, a 28 tooth sun gear and a 74 tooth ring gear.
1.405% Uses 23 tooth planet gears, a 32 tooth sun gear and an 79 tooth ring gear.
1.438% Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear.
1.479% Uses 19 tooth planet gears, a 35 tooth sun gear and an 73 tooth ring gear.
1.500% Uses 19 tooth planet gears, a 38 tooth sun gear and a 76 tooth ring gear.
1.566% Uses 18 tooth planet gears, a 45 tooth sun gear and an 81 tooth ring gear.

In general, all LENCO transmissions are a planetary design. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio.


In order to achieve an underdrive first gear launch ratio the LENCO transmission relys on planet gears which rotate around the sun gear.
 

Each sun and planet gearset provides two speeds. Those two speeds are (1) the lower underdrive ratio and (2) the direct 1:1 final lock-up drive ratio.

 

Each LENCO transmission is thus a two speed and is housed in one dedicated two speed.

We acheive more than two speeds by combining multiple cases.

For example, a three speed requires two cases.
A four speed requires three cases.

A five speed requires four cases, and a six speed requires five cases.

 

 

Since each case contains one gearset and provides both underdrive and direct drive, multiple cases (gearsets) provide multiple underdrive ratios.

 

You must multiply each cases underdrive ratio in order to determine the first gear ratio.


In the example of a four speed, the case nearest the engine would contain a 1.37 ratio planet gear set. The middle case would also contain a 1.37 planet gear set.
The rear case a 1.31 ratio gearset.

 

 

By multiplying these three ratios you come up with a 2.46 first gear ratio. Second gear ratio is 1.80 and third gear is a 1.31 ratio. Final drive ratio is 1:1.

 

Multiply all three gearset ratios to determine the first gear ratio of 2.46:1. Multiply the two rear case gearset ratios to determine the second gear ratio of 1.80:1. The gearset in the third case alone, 1.31:1, determines the third gear ratio. All three units shifted equal final drive ratio of 1:1.

 

The internal action of a LENCO is such that when the transmission is in first gear the dedicated planet gear assembly provides the launch ratio. The planet gears are driven by an encompassing ring gear.

 

When the transmission is shifted a clutch pack compresses the rotating sun gear assembly to the direct drive central sun gear. Thus a 1:1 ratio is achieved.

 

Each case in succession, with its particular underdrive ratio, determines the immediate drive ratio.

 

Once all cases have been shifted the entire transmission assembly is locked in the final 1:1 direct drive ratio.

 

It is not necessary for the driver to disengage the clutch when shifting from ratio to ratio since all shifting is done with the engines clutch fully engaged.

(909) 673-9080

Please call for ordering or technical information.

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  • Brand: Lenco Racing
  • Product Code: BOAT-CS2
  • Availability: In Stock
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Tags: boat, boat transmission, drag boat, drag boat transmission, cs2