2023 Classes & Rules

Formula – Boats originally configured to seat 3 or more. All 2.5 litre motors that are EFI Laser injected, may delete VST and upgrade electronics but at a 50lb additional weight with compression limited to 130lbs. All 2.4 litre motors allow 165lbs of compression as is the 2.5 carb motor. Only steel or chrome bores, no nic plated motors allowed, except for 2.4 or 2.0. No trim timers allowed; no aftermarket ignitions allowed. Modifications to motors allowed. 24 volt trim allowed. Mids allowed 15” and above. No small gearcases allowed. Yamaha and Johnson/Evinrude motors allowed 2.7litre and below and must retain stock ignition. This class is intended for entry level racers only. Weight requirements are at the sole discretion and decision of the S.O.D.A technical crew. Please call about your rig BEFORE you bring it to a race. Weights will be determined by entries that are entered.

Formula ll – Boats originally configured for 3 or more seats. All motors 2.7 litre and below allowed. Modifications allowed to motor. 15” and above mids, no small gearcases, 24 volt trim allowed, trim timers allowed. All XRI or Laser injection motors allowed 165lbs compression, no alteration to Laser air system, must remain stock. If equipped with an SVS intake or similar system the front butterflies/slide must be disconnected. All carb motors are 205lb compression limit. No aftermarket ignitions, motors must use stock ignition. This class is intended as a step to V6 Pro or other classes. Only steel or chrome bores allowed, except for 2.4 or 2.0 litre motors. Stock bores on intake throttle butterflies only.

Minimum weight is 1325lbs. Please call about your rig BEFORE you bring it to a race.

Bass and Ski – Any hull originally configured to seat 3 or more. Any motor combo, no alcohol, no nitrous. 2.7 litre and below 1,600lbs, 2.8 litre and above 1,750lbs, all V8 motors 1,900lbs. Motor combinations for V6 Pro minimum weight 1500lbs with 4/5 petal fronts @1450lbs. 15'' and above midsections allowed.

Pro Carb – Any type hull allowed, any motor combo, race gas with additives allowed, no alcohol based fuels, any mid, any gearcase, any mods. Small block motors 2.7 and below 1400lbs, 2.8 and above 1550lbs. Boats using Modified Carb rules

(150lb Compression limit) may deduct 50lbs. Carbs only, bypass setup allowed.

River Mod – Any type hull allowed. Any motor configuration, midsections 12” and up, any gearcase, no alcohol, no nitrous. Boats running under River Racer will have compression limited to 150lbs 2.7 litre and below 1350lbs, 2.8 and up 1500lbs, all v-8 motors 1700lbs. Pro Mod 1400 boats will be 1400lbs for 2.7 and below, 2.8 and above 1550lbs, V8 1700lbs. V6 Pro Combos allowed @ 1300lbs with mercury 4/5 petal motor combos @ 1250lbs. Pro Carb motors allowed @ 1270lbs. V6 Pro only permits 4 ¾ gearcases. (NO small cases with V6 Pro setup)

V-6 Pro – Any type hull allowed, only Pro Max or black motors allowed, steel or chrome bores, no nic bores or high performance nic motors allowed, except for 2.4, 2.0 litre motors. All 2.4, 2.0 motors are allowed unlimited compression as is 2.5 steel carbureted motors (see below). XRI injection with stock setup is allowed 185lbs compression. SVS or alteration to stock setup allows 165lbs compression. Mercury 4/5 petal front motors with stock XRI or carbs with compression limit of 155lbs allowed @ 1,275lbs. 2.7 litre and below 1,325lbs. Only 4 3/4'' gearcases allowed, no small diameter cases permitted. Midsections 12'' and above.

Pro Mod 1225 Any type hull allowed, any motor configuration, any midsection, any gearcase, no alcohol, no nitrous. 2.7 litre and below 1225lbs, above 2.7 litres 1375lbs (V6), V8 1525lbs

Pro Drag/Unlimited Any type hull allowed, any motor combo, alcohol allowed, nitrous allowed, no minimum weight.

If you have a stroked motor be prepared to remove a head to determine displacement. Inspections may be required before you race, be prepared to remove your cowlings for a visual only, unless otherwise determined. Please have all kill switches in working order. Our safety inspector will check everyone. Tethers must be functional.

All Classes may use gasoline, race gas, pump gas with additives allowed. The exception is Pro Drag where any fuel is allowed.

Race payouts – Entry fees will be 80% payback. Purse payout are donations strictly for purse money. No purse money will be disbursed in a class of 3 boats or less. Payouts are as follows- 2-9 boats 1st place 65% 2nd place 35% of payable entry money. Classes with 10 or more boats 1st-60% 2nd 25% 3rd 15%. High Points will follow the boat with 2 substitutions allowed per season with a paid member in good standing.


Entry Fees are as follows:

Technical Inspection Clarification

Our technical inspections are to make sure you are in compliance with our rules. Here are a few clarifications. 

1. Fuel additives - Fuel additives are allowed. Some contain methanol and other properties

Such as propylene oxide.  We check only for methanol and is a simple separation test

With water.  As long as you are not over 40percent methanol, you are good.  Anything above 40.0 is a DQ.  We do offer courtesy checks before the race, but before the drivers meeting.

2. Compression Test - Simple.  If the rule states 150lbs, it is 150.0.  A reading of 150.1 is a DQ.

3. 2.7 Litre - This rule was designed to keep like engines in place with the Mercury 2.5.  They are OMC 2.7 and Suzuki 2.7. Yamaha had 2.6 so it fell in the mix.  If the OMC or Suzuki were bored to 30 over, that would put them over 2.7 litres, which is allowed as long as it starts with a standard bore for each.  Be prepared to remove 1 cylinder head if needed at race.  

4. Weighing boats - Boats that come in under weight will be penalized as follows


All Rules and Weights Subject to Change After Any Event

If the SODA technical crew observes that there are any significant discrepancies between entries within a class, it may be determined necessary to update rules during the season. SODA officials reserve the right to make necessary changes at any time.