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The CH-3 Airboat Belted Reduction Drive Unit is designed for a large block GM, Chevrolet, and Cadillac engine. The CH-3 models can bolt to GM V-8, Small Block, V-8 Big Block, and GM Diesels. CH-3 models are used on 15' and larger airboats. The available ratios for a CH-3 belted airboat drive unit are: 1.5 to 1 1.774 to 1 2 to 1 2.3 to 1 The drive belts for CH-3 models are 5" wide and can use HPPD Plus or Blackhawk belts which are rated 60% stronger than the standard HPPD Plus style. The CH-3 models are similar to the CH-2 models but are stronger and use a wider belt. The drive units carry a 100 hour factory warranty. Our a CH-3 models are rated for 600 horse power engines
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