GP 1" Engine Shaft for GX390 B18 Gear Box
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General Pump YGR-1000 Gear drive 2.2 to 1, 11-18hp with 1" shaft
Compact design with easy mount, and universal flange for quick and direct coupling to a wide range of engines.
Oil bath lubrication combined with premium quality, hardened steel helical gears for quiet operation and extended life.
The oversized bearing system is self-aligning. Reduces load on motor bearings and pump bearings.
Reversible mounting for right- or left-hand drive gas engines. Includes reversible dip stick and oil-level sight glass.
Specifications:
- Drive ratio: 2.176:1
- Horsepower: 11-18 hp
- Input motor shaft: 1" (25.4mm)
- Output pump shaft: 24mm
- Motor flange: J609A
- Pump flange: fits 47, 47ss, and 66 series general pumps.
- Oil grade: SAE 90 gear lube
- Oil capacity: 10 oz.
Weight: 5.8 lbs.
Fits the following motors:
GX390
GX340
GX270
CRX420
Predator420
About Expert Power Wash
Expert Power Wash is built and operated by Tim and Kristina — a team passionate about giving
pressure washing professionals the best equipment available. Every skid is hand-built in Oregon City, OR, with a focus on quality, reliability, and ease of use in the field.
Our goal is to source 95% of the parts we use from the USA. We distribute across 24 states, Canada, and overseas — backing every unit with a lifetime warranty and personal customer support. We don't just sell equipment; we help you build a successful business with hands-on training and ongoing guidance
Shipping & Pickup
We recommend in-person pickup in Oregon City, OR — this includes a free 2-hour
hands-on training session so you leave confident operating your skid. Transport
shipping is also available and coordinated directly with you.

