Honda GX240-GX390 12V Starter Solenoid 31204-ZA0-003
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
- Honda GX240, GX270, GX340, GX390 electric-start engines
- Honda GXV270, GXV340, GXV390 applications with matching starter
- Honda H3011, H3013H, H4013, H4213, H4514H, H5013, HT3810, HT3813, HTR3009
- Generators, pressure washers, pumps, tractors, and construction equipment using the matching Honda starter
Product Overview
A click with no crank, intermittent starter engagement, or voltage present at the control terminal but missing at the starter side can identify a bad solenoid. Battery condition, grounds, cables, key switch, safety circuit, and starter motor should be load-tested first.
The solenoid connects battery current to the starter motor. The number 31200-ZA1-003 commonly identifies a complete starter assembly that may use this style of solenoid; it is not the primary solenoid service number.
Match 31204-ZA0-003, 12-volt system, three-terminal layout, mounting bracket, plunger or starter interface, and original starter. Some replacement solenoids mount directly to a Denso starter.
Key Features & Performance
- 12-volt magnetic starter switch
- Three-terminal configuration for matching Denso-style starters
- Routes high battery current after receiving a start signal
- Replacement for burnt contacts or an open pull-in coil
Replaces Part Numbers
- 31204-ZA0-003
- 31204ZA0003
- 182800-1570
- 1828001570
- Fits starter assembly references including 31200-ZA1-003; verify starter
Common Uses
- Repairing a starter that only clicks
- Replacing heat-damaged battery studs
- Correcting a confirmed internal voltage drop across the solenoid
Technical Specifications
- Product Type: Starter-mounted solenoid / relay
- Voltage: 12 V DC
- Terminal Count: 3
- Condition: New aftermarket replacement
Installation & Fitment
- Disconnect the negative battery cable
- Load-test the battery and both cables
- Label battery, motor, and control terminals
- Support the starter during removal if necessary
- Check cranking voltage and starter disengagement after installation
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application that is not shown above. Model year, production date, serial number, engine or equipment specification, installed options, and previous repairs can change fitment. Match the original part, reference number, dimensions, connectors, mounting points, and product photos before purchase.
Frequently Asked Questions
Q: Does this replace 31200-ZA1-003? A: 31200-ZA1-003 is generally a complete starter assembly reference. This listing is for the matching solenoid style, primarily cross-referenced to 31204-ZA0-003.
Q: Why does the solenoid click but the engine not crank? A: Low battery voltage, bad cables, seized engine, worn starter, or burnt solenoid contacts can all cause that.
Q: Will it fit every GX390 starter? A: No. Compare the starter manufacturer, terminal layout, mount, and part number.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: Honda 31204-ZA0-003 solenoid, GX390 starter relay replacement, GX240 click no crank repair, 31200-ZA1-003 starter solenoid, Honda Denso starter switch
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.