Products: : OS Engines
MAX-91SZ-H RING PS-HYPER (60M-P)   Price: 475.00$ 

Plentiful power for 3-D thrills.
Designed to deliver premium performance for 30-sized machines, from extreme aerobatics to stable hovering!
• The crankshaft has been re-engineered to reduce vibration, resulting in smooth power across the entire rpm range.
• A larger rear bearing boosts power even more.
• Features the same mounting pattern and muffler dimensions as the 32SX-H, for easy installation in most 30-size helis.
Displacement: 0.91 cu in (15 cc)
Bore: 1.02 in (25.8 mm)
Stroke: 0.87 in (22.0 mm)
Practical rpm: 2,000-16,000
Output: 3.3 hp @ 15,000 rpm
Weight w/o muffler: 21.3 oz (605 g)
Includes: fuel pump, #8 glow plug
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