As found in APBA OPC 2022 Rulebook Rule 19.6

Technical Standards

1) Minimum driver’s age: 12

Motor Standards

1) Any 25 horsepower (small bore carburetor), two cylinder, 31.8 cid., thru-hub Johnson or Evinrude

2) Any 30 or 35 horsepower (large bore carburetor), two cylinder, 31.8 cid. Johnson or Evinrude is allowed

3) Unlimited part swapping with parts original to the 31.8 cid. OMC powerhead is allowed.

4) Engines must be stock—as manufactured (no blueprinting)—with the following exceptions:

i. RPM limiters and oil injection systems may be removed.

ii. Electric start may be added.

iii. Solid or pinned motor mounts are allowed.

iv. Tiller arms may be removed.

v. Air silencers may be removed. vi. Skeg wear bar may be removed.

vii. Under-flywheel ignition may be converted to powerpack ignition using OEM or aftermarket parts/kits.

viii. Neutral start switch may be removed.

ix. Cylinders may be bored .30 over and fitted with OEM oversize pistons.

x. Reeds of any material, OEM or aftermarket, are allowed. xi. Cosmetic appearance of engine may be changed.

5) 30/35 hp only: Power trim, manual-trim or spoilers, adjustable while the boat is underway, are allowed. Up to 24 volt starting system allowed.

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

7) Two 1” diameter holes that can be readily plugged (for testing) may be drilled in the lower unit above the cavitation plate.

8) Cosmetic appearance of engine may be changed.

9) Engines must be securely bolted to the boat with a minimum of two bolts.

Boat Standards

10’0” long, 48” wide minimum

Minimum Weights: 30/35 HP - 650 lbs.

25 HP - 525 lbs.

1) Homebuilt, custom-built or production boats of any material are allowed.

2) Boats may be V-bottom, modified vee or tunnel (no hydroplanes), with four inch minimum tunnel depth at transom.

3) Drivers must be sitting in a seat at all times, using a foot throttle and steering wheel.

4) Junction of seat and seat back may not be more than 36” rearward of midships.

5) Boats will be required to start off plane.

6) Propellers: Any propeller, prop nut, washer and thrust washer are allowed.