The Genuine Tohatsu 309-64126-1 Shear Pin is an OEM propeller-drive protection pin used on selected Tohatsu 2HP, 2.5HP and 3.5HP portable outboards. The pin transfers drive from the propeller shaft to the propeller. If the propeller strikes a submerged object or becomes heavily jammed, the pin is designed to shear, helping protect more expensive components in the propeller and gearcase drive system.
Piston & Crank Shaft (Tohatsu)
Propeller Shear Pin 309-64126-1
Brand: Tohatsu
SKU: 309-64126-1
$7.45
Key benefits
Key Benefits
- Genuine Tohatsu/Nissan OEM part
- OEM Part Number 309-64126-1
- Factory size 4 × 24 mm
- Propeller shear / drive pin
- Helps protect the drivetrain if the propeller strikes an obstruction
- Easy replacement item
- Excellent spare part to keep onboard
- Fits selected 2-stroke and 4-stroke portable outboards
Compatible Tohatsu Outboard Motors
- 2-Stroke
- M2.5A2 – 2.5HP
- M3.5A2 – 3.5HP
- M3.5B2 – 3.5HP
- 4-Stroke
- MFS2A / MFS2A2 – 2HP, MFS2B – 2HP — serial dependent, MFS2C – 2HP, MFS2.5A – 2.5HP, MFS2.5B – 2.5HP, MFS2.5C – 2.5HP
- MFS3.5A / MFS3.5A2 – 3.5HP, MFS3.5B – 3.5HP, MFS3.5C – 3.5HP
How the Shear Pin Works
- The 309-64126-1 passes through the propeller shaft and engages the propeller. Under normal operation it transmits engine torque to the propeller.
- If the propeller hits a solid obstruction, excessive load can cause the relatively inexpensive shear pin to break before that shock load damages more expensive drivetrain components.
- Because it is designed as a sacrificial component, do not substitute an ordinary hardened steel pin, drill bit or bolt.
Signs the Shear Pin Needs Replacing
- Typical indications include the engine running normally but the propeller not turning, sudden loss of propulsion after hitting an obstruction, the propeller rotating freely without driving the boat, or a visibly bent or broken pin when the propeller is removed.
- Whenever a pin shears, inspect the propeller for impact damage before installing the replacement.
Maintenance Advice
- Keeping one or more spare 309-64126-1 shear pins onboard is recommended, particularly on portable outboards operated in shallow water.
- Also check the propeller retaining hardware and split pin during replacement.
Shipping
Ships Australia-wide