Boat Racing 101: Class Structure

Stock Outboard Racing is set up similar to “Stock-Car” Racing in that there are very specific rules designed to make the group of boats racing against each other as closely matched in speed as possible.  Specific engine usage, specific boat sizes, overall weights and in some classes specific set up specifications are all used to ensure closely competitive racing, which is best for both those competing in the races and the spectators on shore.  When new engines are introduced a competition committee is often set up by the national organization to make sure that the new engine will be competitive with the other available options while not a clear, overwhelming advantage that will put those who own the older models out of contention.

In order to offer competitive racing options to racers of different ages, driving experience and physical stature, Stock Outboard has set up classes all with their own specific rules.  When you visit a race for the first time you will see a whole day of racing as we work through the schedule of classes, one minute you will see kids as young as 9 competing (against other kids) in the Junior class in boats running in the 35 mph range and the next you may see the powerful “D” hydros approaching speeds of 80 mph or more.  You will also see that the same motors are often allowed in multiple classes with different setup configurations.  This allows new racers to progress into faster more competitive classes as they gain experience and seasoned drivers the ability to run multiple classes without purchasing additional equipment. In most cases there is a Runabout and Hydroplane option for each class with their own separate rules.

Here are the general specifications for the 16 Stock Outboard classes, including:

  • The minimum age for a driver to run the class
  • The overall minimum weight for the class which is measured as boat / motor / driver / gear as the rig runs on the course
  • The motor options for the class
  • Approximate speed range for the class for competitive boats

For more in-depth and specific rules please consult the APBA Junior or Stock Outboard rule books

Specifications for the OSY400 class which is actually not a stock outboard class but instead falls under the Pro Category are also included.  OSY400 runs at many Stock Outboard events.  It (in general terms) can be run with a Stock Outboard hydro after some setup adjustments.  OSY400 allows Stock drivers the opportunity to step over to the Pro Ranks and even International Competition should they choose to do so.

“J” Stock Hydro / JSH

This is the Junior class run on hydroplanes
Ages: 9 – 16
Min. Weight: 300 lbs.
Motor Options: OMC 15ss & Mercury 15
Approx Speed: 35 mph
* Both engines are fitted with a carb. restricter plate meant to restrict top speed

* J class participants also use club issued / matched propellers to keep costs down and further match speed between competitors

“J” Stock Runabout / JSR

This is the Junior class run on runabouts
Ages: 9 – 16
Min. Weight: 300 lbs.
Motor Options: OMC 15ss & Mercury 15
Approx. Speed: 35 mph
* Both engines are fitted with a carb. restricter plate meant to restrict top speed

* J class participants also use club issued / matched propellers to keep costs down and further match speed between competitors

“AX” Hydro / AXH

The step-up class from J Hydro
Min. Age: 12 – no max age
Min. Weight: 325 lbs.
Approx. Speed: 45 mph

Motor Options: OMC  15ss fitted with restricter (larger than J) & Mercury 15 (unrestricted)

“AX” Runabout / AXR

The step-up class from J Runabout
Min. Age: 12 – no max age
Min. Weight: 330 lbs.
Approx. Speed: 45 mph

Motor Options: OMC  15ss fitted with restricter (larger than J) & Mercury 15 (unrestricted)

“A” Stock Hydro / ASH

Min. Age: 14
Min. Weight: 330 or 345 lbs (depends on engine used)
Motor Options: OMC 15ss, Mercury 15, Sidewinder A

Approx. Speed: 50 Mph

“A” Stock Runabout / ASR

Min. Age: 14
Min. Weight: 335 or 350 (depends on engine used)
Motor Options: OMC 15ss, Mercury 15, Sidewinder A

Approx. Speed: 45 Mph

“B” Stock Hydro / BSH

Min. Age: 15
Min. Weight: 365 lbs
Motor Options: Hot Rod 15, Sidewinder 15H, Sidewinder 20S (w/ Restricter)

Approx. Speed: 55 mph

“B” Stock Runabout / BSR

Min. Age: 15
Min. Weight: 365 lbs
Motor Options: Hot Rod 15, Sidewinder 15H, Sidewinder 20S (w/ Restricter)

Approx. Speed: 50 mph

“302” Super Stock Hydro / 302ssh

Min. Age: 14
Min. Weight: 420 lbs
Motor Options: Factory Sealed Yamato Y302

Approx. Speed: 50 mph

“20” Super Stock Hydro / 20ssH

Min. Age: 15
Min. Weight: 400 lbs.
Motor Options: Yamato Y80, Yamato Y102 (w/ Restricter), Yamato 302 (w/ Restricter), Sidewinder 20S

Approx. Speed: 60 mph

“25” Super Stock Runabout / 25ssR

Min. Age: 16
Min. Weight: 395 – 430 (depends on motor choice)
Motor Options: Mercury 25ss, Mercury 25XS, Hot Rod 20, Sidewinder 20S, Yamato Y102 (w/ Restricter), Yamato Y302 (w/ Restricter)

Approx. Speed: 55 mph

“C” Stock Hydro / CSH

Min. Age: 16
Min. Weight: 440 lbs
Motor Options: Yamato Y102, Yamato Y302

Approx. Speed: 65 mph

“C” Stock Runabout / CSR

Min. Age: 16
Min. Weight: 475 lbs
Motor Options: Yamato Y102, Yamato Y302

Approx. Speed: 60 mph

OSY-400 (Hydro)

Min. Age: 14
Min. Weight: 396 lbs
Motor Options: Yamato Y80, Yamato Y102, Yamato Y202, Yamato Y302
Approx. Speed: 65 – 70 mph
*APBA PRO Class

*Utilizes Beach or Jetty Starts where ever possible

“25” Super Stock Hydro / 25ssH

Min. Age: 16
Min. Weight: 400 lbs
Motor Options: Mercury 25XS, Mercury 25ss, Hot Rod 20, Sidewinder 20S

Approx. Speed: 70 mph

“D” Stock Hydro / DSH

Min. Age: 18
Min. Weight: 480 lbs
Motor Options: Tohatsu 50, Mercury 44XS

Approx. Speed: 80 mph

“D” Stock Runabout / DSR

Min. Age: 18
Min. Weight: 515 lbs
Motor Options: Tohatsu 50, Mercury 44XS

Approx. Speed: 70 mph

 

 

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One thought on “Boat Racing 101: Class Structure

  1. Pingback: Official Entry #8: Deck Racing Promo 2015 | The Independent Boat Racer Blog

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