NGK BP6HS-10 Spark Plug Tohatsu M2 M2.5 M3.5 2-Stroke

NGK BP6HS-10 Spark Plug for Tohatsu 2–3.5 HP 2-Stroke Outboards

Original-specification NGK spark plug for the small single-cylinder Tohatsu M2, M2.5 and M3.5 carburetted 2-stroke outboard families. The projected-tip BP6HS-10 is the Tohatsu-listed service plug for these engines.

Verified Tohatsu Compatibility

• M2: selected 2 HP 2-stroke models
• M2.5A: 2.5 HP 2-stroke — 1980–1996
• M2.5A2: 2.5 HP 2-stroke — selected production years
• M3.5A: 3.5 HP 2-stroke — 1986–1990
• M3.5B: 3.5 HP 2-stroke — 1991–1996
• General Tohatsu application: M2/M2.5/M3.5 carburetted 2-stroke families

Identification: check the complete model code and serial number on the engine plate. MFS-prefixed 4-stroke engines do not use this plug specification.

Technical Specifications

Check Before Ordering

1. Confirm that the engine model begins with M, not MFS.
2. Read the full model suffix and serial number from the ID plate.
3. Compare BP6HS-10 with the owner's manual or existing spark plug.
4. Install using the Tohatsu tightening procedure and specified torque.

Do not order for a 4-stroke model: similar horsepower does not mean the plug is interchangeable.

Frequently Asked Questions

Is this the correct plug for a Tohatsu M2.5A?
Yes. NGK lists BP6HS-10 for the M2.5A 2-stroke family, including the 1980–1996 catalogue application.

Will it fit an MFS2.5 or MFS3.5?
No. MFS identifies a 4-stroke engine and requires a different spark-plug family.

How many plugs are supplied?
One plug is included, which is normally the service quantity for the verified single-cylinder small outboards.

Is BP6HS-10 a resistor plug?
No. BP6HS-10 is the non-resistor specification. Do not substitute a resistor version unless the exact engine documentation permits it.