Genuine Tohatsu Starter Spring 307-05004-0 Nissan Mercury 2.5HP 3.3HP 3.5HP
307-05004-0
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Genuine Tohatsu Starter Spring
Part Number: 307-05004-0
This Genuine Tohatsu Starter Spring is an authentic OEM replacement part designed for the recoil starter assembly of small marine outboard engines. As a vital component of the manual pull-start system, this high-tension spring provides the mechanical energy required to automatically retract the starter rope back into the pulley housing after each pull.
Key Features
- ✔ Genuine OEM: Authentic Tohatsu factory part.
- ✔ Perfect Tension: Ensures consistent rope return.
- ✔ Corrosion Resistant: Built for salt and freshwater use.
- ✔ Direct Fit: No modifications required for listed models.
Technical Specs
| Manufacturer | Tohatsu (Japan) |
| SKU / MPN | 307-05004-0 |
| Material | Hardened Spring Steel |
| Part Type | Recoil/Spiral Spring |
Compatibility / Fitment Guide
| Make | Model / Application | Notes |
|---|---|---|
| Tohatsu | M2.5A2, M3.5A2, M3.5B2 | 2-Stroke Models |
| Tohatsu | MFS2.5, MFS3.5 (All Series) | 4-Stroke Models |
| Nissan | NS2.5A2, NS3.5A2, NS3.5B2 | Equivalent models |
| Mercury / Mariner | 2.5HP, 3.3HP, 3.5HP | Japan-built (Tohatsu based) |
OEM Cross Reference
| Tohatsu OEM | 307-05004-0 |
| Nissan OEM | 307-05004-0M / 307050040 |
| Mercury OEM | 803683 / 24-803683 |
Questions & Answers
Is this a genuine original part?
Yes, this is an authentic Tohatsu OEM part sourced directly from Japan. It is not an aftermarket copy, ensuring the best possible performance and longevity for your engine.
Does it come pre-wound or lubricated?
The spring is typically supplied in its flat, tensioned state. We recommend applying a light coating of marine-grade water-resistant grease during installation to prevent corrosion and ensure smooth operation.
Will this fix my starter if the rope doesn't pull back?
Yes, a snapped or fatigued starter spring is the most common cause for a pull-cord failing to retract. Replacing this part usually restores full function to the recoil assembly.
Note: 4boats.co.uk recommends verifying your engine model and serial range before purchase. For technical assistance, please contact our support team.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
