HAISHINE Nikasil-Plated Cylinder & Piston Rebuild Kit for Husqvarna 51/55/Rancher — 46mm Complete Engine Repair

HAISHINE's Nikasil-plated cylinder and piston kit is a complete 46mm rebuild set designed to restore compression and reliable performance for Husqvarna 51, 55 and Rancher chainsaws.

This all-in-one replacement kit supplies the core engine components and consumables you need to perform a thorough small-engine rebuild. The kit uses a nikasil-like hard coating on the cylinder for improved wear resistance and includes piston, rings, needle bearing and essential gaskets and fuel components to help return a worn chainsaw to dependable operation.

How will this kit fit my Husqvarna 51, 55 or Rancher chainsaw?

The kit is engineered specifically for models that accept a 46mm cylinder bore. It replaces the listed OEM part numbers and matches the dimensional requirements for these Husqvarna chainsaws. Always confirm your engine's bore size and model compatibility before purchasing.

• Designed for 46mm cylinder outer diameter (OD)
• Compatible with Husqvarna 51, 55 and Rancher EU1 models
• Direct replacement for OEM codes 503609172 and 503 16 91-71

What parts are included and why are they useful?

This kit bundles the principal wear items and a few consumables so you can complete a rebuild without sourcing extra pieces. Including fuel line and filter plus a spark plug and gaskets makes the repair more convenient and reduces the risk of missing small but critical parts.

• Cylinder with nikasil-style plating for improved surface hardness
• Piston, piston ring, pin and circlips for proper sealing and retention
• Needle bearing for smooth connecting-rod rotation and reduced wear
• Fuel line, fuel filter, spark plug and both cylinder and muffler gaskets included

How does the nikasil plating affect durability and maintenance?

Nikasil-style surface treatment creates a hard, wear-resistant cylinder bore that reduces abrasion between piston and cylinder. This means longer service life and more consistent compression, provided the engine is operated with proper lubrication and air filtration.

• Harder bore surface reduces scoring and wear
• Improved heat transfer and dimensional stability under load
• Helps maintain compression for longer intervals between rebuilds

What should I check before and after installing the kit?

Confirm engine compatibility and inspect the crankshaft and connecting rod for damage before installing; replacing the cylinder and piston on a damaged crank assembly can cause premature failure. After installation, follow a proper break-in routine and recheck torque and clearances to ensure long-term reliability.

• Verify 46mm bore and OEM part number alignment
• Inspect crank, bearings and reed/valve surfaces for wear
• Perform recommended post-installation break-in and retorque fasteners

Who is this for: This HAISHINE kit suits DIY mechanics, small-engine repair shops and owners of Husqvarna 51/55/Rancher chainsaws who need a complete 46mm rebuild package. It’s intended for users comfortable with disassembling and reassembling two-stroke engines and who want a single purchase to replace core engine wear components plus essential fuel and ignition consumables.