As found in APBA OPC 2022 Rulebook Rule 19.2

Technical Standards

1) Max Total Cu. In. Displacement: 35.00 CU

2) Min Boat Length: 8' (14' max)

3) Min Boat Weight: 675 lbs.

Boat Standards

1) Trim tabs or after-planes are allowed, and may be adjustable while the boat is underway; however, hydrofoils shall not be permitted.

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

3) Boat must be of vee, flatbottom, modified vee, or tunnel design; no hydros. The boat must be at least 48.0 inches wide.

4) Driver must be seated in a seat.

5) Running surfaces may be altered.

6) Factory or non-factory turn fins or skegs are allowed.

7) Transom adapters for raising, lowering or extending the engine will be allowed, but must be fixed while underway.

Motor Standards

1) Super Stock and Altered engines are not eligible in OPC Sport C Class.

2) Engine cowling must be in place during race. If cowling or engine is repainted it must be repainted to original colors to retain product identification.

3) Tiller arms may be removed.

4) Any reed material will be acceptable.

5) Gearcases’ outside surfaces may be contoured, but must meet production specifications.

6) Solid or pinned motor mounts allowed.

7) The skeg may be sharpened to a 1/32 radius and the wear plate removed.

8) Sport C engines may have a substitution of a maximum of 2 sleeves of any manufacturer with original porting specifications and the same material will be allowed for the repair of damaged cylinders.

9) Grinding is permitted to match block casting to the ports/liner. No grinding is permitted beyond 5/8 inch past the liner into the casting of the block. All OPC Technical Specifications must be maintained.

10) Sport C class is to use one 12-volt “nominal” battery only.