As found in APBA OPC 2022 Rulebook Rule 19.3.C

Technical Standards

1) Max Total Cu. In. Displacement: 122.0 (2.0 L)

2) Min Boat Length: 16'

3) Min Boat Weight: 1100 lbs.

Boat Standards

1) Any design of boat including bottom, deck, cockpit openings and seating arrangements is permissible so far as boat meets minimum length.

2) Power trim and/or adjustable spoilers shall be allowed in Super Stock.

Motor Standards

1) All cowling and engine graphics and colors shall be the same as OEM for product identity and may either be OEM or aftermarket.

2) SST 120 class can change engine wiring to allow 24-volt starting system.

3) The SST 120 class gear cases may have their outside surfaces refinished; however, they must meet the requirements of OPC Engine Specification sheets and the original design. The outside surfaces of the gear cases may be either painted or unpainted. If painted, the color of the paint must be the same as the original factory motor color. If the gear cases are unpainted, any surface finish is acceptable.

4) In SST 120 it is permissible to remove, or render inoperable, the engine primer system and plug all primer related holes in the fuel system opened by removing the primer.

5) SST 120 engines may have a substitution of a maximum of 6 sleeves of any manufacturer with original porting specifications and the same material will be allowed for repair of damaged cylinders.

6) SST 120 reeds may be of any material or design.

7) SST 120 cylinder block exhaust port outlet openings may be re-machined to the maximum dimensions shown in the OPC Specification Sheet. Only machined openings are acceptable, machined in the same manner as originally done with no grinding or blending of any sharp edges.

8) SST 120 cylinder head combustion chamber pockets may have surface refinished. The cylinder head measurements must be within specified dimensions. No welding or repairs in the combustion chamber surfaces will be permitted.

9) The Mercury-produced bolt-on plate muffler is an optional part for the SST 120 class. Note that this part fits only the studs-down SST 120 engine.

As found in APBA OPC 2022 Rulebook Rule 19.3.B

Technical Standards

Mercury 2.0 L:

1) Max Total Cu. In. Displacement: 122.0 (2.0 L)

2) Min Boat Length: 16'

3) Min Boat Weight: 1100 lbs.

Mercury 2.5 L:

1) Max Total Cu. In. Displacement: 154.0

2) Min Boat Length: 16’

3) Min Boat Weight: 1175 lbs.

Mercury 200 APX:

1) Min Boat Length:16’

2) Min Boat Weight: 1200 lbs.

200 XS Optimax:

1) Max Total Cu. In. Displacement: 153.0

2) Min Boat Length: 16’

3) Min Boat Weight: 1200 lbs.

Yamaha 2.6 L:

1) Max Total Cu. In. Displacement: 158.4

2) Min Boat Length: 16’

3) Min Boat Weight: 1200 lbs.

OMC 3.0 L:

1) Max Total Cu. In. Displacement:183.0

2) Min Boat Length: 16’

3) Min Boat Weight: 1200 lbs.

Boat Standards

1) Any design of boat including bottom, deck, cockpit openings and seating arrangements is permissible so far as the boat meets the minimum length.

2) Power trim and/or adjustable spoilers shall be allowed.

Motor Standards

Formula 200 engine standards for Optimax 200 XS, Yamaha, OMC and Mercury 2.5L Carb are outlined in the Formula 200 Tech specs.

1) All cowling and engine graphics and colors shall be the same as OEM, this includes the 200 XS Optimax engine.

2) The Formula 200 class can change engine wiring to a 24-volt starting system. The Optimax 200 XS must use 12-volt starting system.

3) The Formula 200 class gear cases may have their outside surfaces refinished; however, they must meet the requirements of OPC Engine Specification sheets and the original design.

4) The SST 120 engine, unaltered, is a legal engine in Formula 200 class, and must meet the SST 120 class weight.

5) The Mercury 200 APX must be raced as homologated.

As found in APBA OPC 2022 Rulebook Rule 19.3.A

Technical Standards

1) Max Total Cu. In. Displacement: 165.0 (2.7 L)

2) Min Boat Length: 16'

3) Min Boat Weight: 1050 lbs.

Boat Standards

1) Any design of boat including bottom, deck, cockpit openings and seating arrangements is permissible so far as boat meets minimum length.

2) Power trim and/or adjustable spoilers shall be allowed in Formula 150.

Motor Standards

1) Standard factory production models of any manufacture may enter F-150. The 200XS OptiMax engine, unaltered, is a legal Formula 150 motor.

2) All cowlings and engine graphics shall be essentially the same as OEM for product identity, and may be either OEM or aftermarket manufacture.

3) All engines must be carbureted with original manufacturer’s carburetors, with the exception of the OptiMax, which is DFI. Carburetors may be modified to prevent shutting off, hesitating or sloshing in the corners or in rough race conditions. The carburetor bores/venturis may not be modified.

4) Only 12- or 24-volt starting system is permitted.

5) Engines may substitute up to 6 sleeves of any manufacture as long as original port specs are maintained.

6) Iron liner engines will be allowed up to .060 over bore for repair.

7) Reed blocks and reed petals may be of any manufacturer but must fit within the OEM intake manifold.

8) All engines may use aftermarket (non-OEM) pistons, rings, bearings, gaskets, and ignition parts.

9) Any gear case, midsection, cowling and transom/trim assemblies are legal.

10) Exhaust stacks must be contained within the driveshaft housing.

11) Powerhead parts must be of original manufacturer with no intermixing of various manufacturers parts. The midsections and lower units are exempt from this rule.

12) Cylinder heads for engines over 156 cubic inches may be modified by welding and matching their combustion chamber pockets to achieve higher compression. All cylinder and heads will be checked, with heads on, by a closed block liquid cubic centimeter (cc) measurement. Above specification includes spark plug thread hole as follows: 158.4 cu. in. Yamaha - 37 cc, 165 cu. in. OMC - 40 cc, 164 cu.in. Modifications to cylinder heads must not alter pocket location or shape from factory heads.

a) F 150 Mercury

• Standard factory production 2.5L engines may be run with no modification to the block or ports.

• No grinding or additional machining.

• Any Mercury connecting rod may be used in any model Mercury engine. Dome pistons and 0-ring heads may not be used.

• 2.5 production blocks may use any tuner.

• No S3000 or 2.5L Nikasil Race blocks allowed.

• 2.5L production blocks require heads of 30 cc volume minimum (flat plate measurement with surface gap plug).

• 2.4L Bridgeport or Oval-port blocks may be used.

1. Bridgeport and oval port blocks may use up to a 7-pedal reed block.

2. Carb venturi of 1.312” maximum.

3. Modified Oval port blocks may use any tuner and head.

4. Stock Bridgeport may use a head of 26cc min. and any exhaust tuner.

5. Bridgeport blocks may use a head of 26cc min and any exhaust tuner.

• 2.0L Oval port SST 120 type blocks with cast in iron liners may be modified in any way.

1. Any reed block assembly.

2. Any Carb venturi.

3. Any exhaust tuner.

• Pre-1989 2.0L Oval-port Champ blocks may be modified and used with:

1. Carb venturi of 1.312” maximum

2. Any exhaust tuner.

3. 2.0L head volume 21cc minimum (flat plate).

• 2.0L Bridgeport Champ block may be modified and used with:

1. Any reed block assembly.

b) F 150 OMC

• OMC engines, may run 165 cubic inch displacement but must maintain stock block, porting and heads. No alterations to these above-mentioned components. No grinding or additional machining. No V-8 blocks.

c) F 150 Yamaha, etc.

• May run 158.4 cubic inch displacement engines but must maintain stock block porting.

• No alterations to the above-mentioned components.

• No grinding or machining.