Ace Redrive - Yamaha Phazer Toothed Belt PSRU (Up to 85HP)

Ace Redrive – Yamaha Phazer Toothed Belt PSRU (Up to 85HP)

Unlock the Yamaha Phazer's aircraft potential — a precision toothed belt PSRU purpose-built for this legendary snowmobile engine.

The Yamaha Phazer engine has earned a devoted following in the experimental aircraft community for good reason: it's a compact, liquid-cooled, fuel-injected V-Twin that delivers impressive power in a lightweight package — and it's available used for a fraction of the cost of certified aviation engines. The Ace Aviation Phazer Redrive is engineered specifically to mate this engine to your propeller with precision, reliability, and the legendary Ace build quality that builders worldwide have come to trust.

With over 685 Ace redrives flying globally and now available through the exclusive US & Canada distributor, you get factory-quality engineering with domestic shipping and real support.

🔧 Engine Compatibility

• Yamaha Phazer (all variants) — 499cc liquid-cooled V-Twin
• Compatible Yamaha snowmobile V-Twin derivatives (confirm fitment before ordering)

⚙️ Technical Specifications

🏆 Why the Yamaha Phazer?

The Phazer engine is a favorite among experimental aircraft builders because:

• Liquid-cooled — More consistent operating temperatures than air-cooled alternatives, ideal for sustained flight
• Fuel injected — Reliable cold starts, consistent fuel delivery at altitude
• Compact & lightweight — Excellent power-to-weight ratio for ultralight applications
• Proven reliability — Millions of hours in snowmobile use before reaching an airframe
• Affordable — Used Phazer engines are widely available at a fraction of certified engine costs

✅ Why Builders Choose Ace

• Eccentric Shaft Tensioner — Set belt tension in under 5 minutes with a single Allen key. No special tools, no guesswork.
• SKF Bearings — Industrial-grade, built for hundreds of flight hours.
• US-Stocked — Ships from the USA. No import delays, no surprise tariff invoices.
• Fully Assembled — Arrives ready to install. No machining required.
• Dedicated US Support — Ace Redrives USA provides real, responsive technical support for your installation.

📦 What's Included

• Complete Ace Aviation Toothed Belt Redrive unit (fully assembled)
• All nuts and bolts for joining redrive components

⚠️ Note: Keyless bush for small pulley-to-crankshaft connection is not included (customer-supplied). Mounting bolts from backplate to engine crankcase are not included (customer-supplied).

Questions about fitment? Contact Ace Redrives USA — we're here to help you get the right unit for your build.