Description
Overview:
The Governor Friction Plunger is a small but critical service part for Jap industrial engines, used to stabilise and control engine speed through the governor mechanism. Built from durable metal to resist wear, it provides the friction needed for smooth, predictable governor action, helping to reduce hunting and speed fluctuations under load. This Genuine Jap part suits older engines commonly found on compact industrial and construction equipment. It is a practical replacement for maintenance or restoration of legacy models such as JAP 4 and JAP 5. Supplied as unused old stock, it offers period-correct fit and function for engines still in service. Designed for direct replacement in the governor assembly, it supports reliable running and consistent performance across a wide working range.
Key Features:
- Genuine Jap part for assured fit and function on compatible engines
- Durable metal construction to withstand continuous governor contact and vibration
- Helps maintain steady engine speed and reduces hunting under varying loads
- Direct-fit replacement to restore correct governor friction in older engines
- Suitable for routine maintenance or refurbishment of vintage industrial units
- Unused old stock for authentic, period-correct servicing of legacy models
- Compact, serviceable component to keep engines running reliably
- Supports smoother idle and predictable throttle response
Typical Applications:
Used in the governor assemblies of Jap industrial engines fitted to compact generators, pumps, mixers, site equipment, and small plant. Ideal for keeping legacy engines stable in construction, agriculture, and workshop settings where consistent engine speed is required for safe, accurate operation.
Also known as:
Governor plunger, friction plunger, governor damping plunger, speed control plunger, governor buffer plunger, governor friction pin.
Fits Models:
4/3, 43, 55, JAP 4, JAP 5, JAP 6
Alternate Part Numbers:
18625/1, 186251
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