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Starter Relay for Yanmar YM, JH replaces 128990-77550

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£43.56 £39.60 Save £3.96

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Yanmar Starter Relay 128990-77550

Name: Starter Relay for Yanmar YM, JH replaces 128990-77550
Price: 39.6 GBP
Rating: 5 (1 reviews)

Premium Replacement for Yanmar Marine Engines

This 12V magnetic starter relay is a high-grade aftermarket replacement specifically designed for Yanmar YM and JH series marine engines. Often referred to as a "magnetic start relay," this component is critical for the reliable engagement of your engine's starter motor. Over time, original relays can fail due to moisture or internal contact wear; this replacement ensures your starting system performs to factory standards.

RELIABILITY: Engineered to meet or exceed OEM 128990-77550 specifications, featuring corrosion-resistant materials for the marine environment.

Key Features

✔ Direct fit replacement
✔ Replaces superseded part 120270-77511
✔ Sealed design for marine durability
✔ Plug-and-play installation

Technical Specs

Voltage:	12V DC
Type:	Magnetic Start Relay
Application:	Starter Motor Circuit
Origin:	High-Quality Aftermarket

Compatibility / Fitment Guide

Engine Series	Specific Models	Notes
Yanmar YM Series	2YM15, 3YM20, 3YM27, 3YM30, 3YM30AE, 3YM30R	Standard 12V Start Relay
Yanmar JH Series	3JH4E, 3JH5E, 3JH5AE, 4JH4E, 4JH4-TE, 4JH4-HTE, 4JH4-DTE, 4JH5E	Compatible with Turbo and Non-Turbo

OEM Cross Reference

Yanmar OEM Number:	128990-77550
Superseded Number:	120270-77511
Recmar Aftermarket:	RM128990-77550 / REC128990-77550

Questions & Answers

Is this a genuine original part?

This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance in marine environments.

How do I know if it is compatible?

We recommend checking the SKU/MPN and Cross Reference list provided above. If your original part number is 128990-77550 or 120270-77511, this is the correct replacement.

What are the symptoms of a failing starter relay?

Common signs include a "clicking" sound when turning the key, the starter motor failing to engage despite a fully charged battery, or intermittent starting issues.

Note: Please verify your engine model and original part number against the references above before purchasing. Domain: 4boats.co.uk.

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Starter Relay for Yanmar YM, JH replaces 128990-77550