Genuine Tohatsu Head Gasket 309-01005-2 2.5/3.5HP 2-Stroke
309-01005-2
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Tohatsu Cylinder Head Gasket
Genuine 309-01005-2 | Small two-stroke outboards
Genuine Tohatsu cylinder-head gasket for small two-stroke powerheads using the 309-01005-2 pattern. It seals the combustion chamber and cooling passages between the cylinder and head and should be renewed whenever the head is removed.
Key Features
- ✔ Genuine Tohatsu OEM head gasket
- ✔ Correct combustion and water-passage pattern
- ✔ Single-use service component
- ✔ For selected 2.5/3.5HP two-stroke powerheads
- ✔ Mercury/Mariner cross-reference available
Technical Specs
| Part type | Cylinder head gasket |
| Engine cycle | 2-stroke |
| Power family | 2.5HP / 3.5HP |
| Manufacturer number | 309-01005-2 |
| Quantity | 1 gasket |
| 4Boats SKU | 309-01005-2 |
Compatibility / Fitment Guide
| Brand | Verified family |
|---|---|
| Tohatsu | M2.5, M2.5A, M2.5A2; M3.5A, M3.5A2 and applicable M3.5B2 diagrams |
| Nissan Marine | Matching NS2.5A/A2 and NS3.5A/A2/B2 two-strokes using 309-01005-2 |
| Mercury / Mariner | Selected Japan-built 2, 2.2, 2.5 and 3.3HP two-strokes using 27-95299001 |
Final check: match 309-01005-2 or Mercury 27-95299001 and compare every bore, bolt and water-passage opening.
Exclusions: not for four-stroke MFS models and not for any engine using a different head-gasket pattern.
Part Number Cross Reference
| Tohatsu | 309-01005-2 |
| Earlier Tohatsu reference | 309-01005-1 |
| Mercury / Mariner | 27-95299001 / 95299001 |
| Recmar | REC309-01005-2 |
| 4Boats SKU | 309-01005-2 |
The Mercury cross-reference applies only to Tohatsu/Japan-built small two-strokes with the matching gasket pattern.
Frequently Asked Questions
Is it genuine Tohatsu?
Yes. This listing is for a genuine Tohatsu gasket.
Can the old head gasket be reused?
No. Fit a new gasket whenever the cylinder head is removed.
Does it fit four-stroke MFS engines?
No. It is for the specified small two-stroke family.
Should sealant be applied?
Use only the preparation and sealant instructions in the exact engine service manual; do not add generic sealant unless specified.
Note: Check head flatness, clean the mating faces carefully and tighten fasteners in the specified sequence and stages.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
