Sierra Rewind Spring 18-6511, Replaces 318940, for 9.9 - 15HP Outboard Motors (1974-1992)

The Sierra 18-6511 Rewind Spring is a recoil starter spring engineered as a direct replacement for outboard motors in the 9.9 - 15HP range built in 1974-1992. This spring is the coiled component inside the manual starter assembly that retracts the starter rope after each pull, resetting the mechanism so the motor is ready for the next start attempt. When a rewind spring weakens, breaks, or loses tension, the starter rope will fail to retract properly or the pull cord will feel loose and unresponsive, making the outboard difficult or impossible to start by hand.

Sierra manufactures this spring to meet or exceed original equipment specifications, so it installs and functions the same as the factory part it replaces. It directly replaces OEM part number 318940, making it straightforward to identify and order the correct spring for a 9.9 - 15HP outboard from the 1974-1992 production years. The part weighs 0.29 pounds as packaged.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-6511
• Product Name: Rewind Spring
• Color: White
• Weight: 0.29 pounds
• UPC: 030999320346
• Horsepower Range: 9.9 - 15HP
• Model Years: 1974-1992
• OEM Cross-Reference: 318940

Fitment

• 9.9 - 15HP outboard motors, 1974-1992

Replaces (OEM)

• 318940

Frequently Asked Questions

What does the Sierra 18-6511 rewind spring fit? The Sierra 18-6511 is designed for outboard motors in the 9.9 - 15HP range built in the 1974-1992 model years.

Does the 18-6511 replace OEM part 318940? Yes, part number 18-6511 is a direct replacement for OEM part 318940.

What does a rewind spring actually do? It is the coiled spring inside the manual starter assembly that retracts the starter rope after each pull, resetting the recoil starter for the next start attempt.

How do I know if my rewind spring needs replacing? If the starter rope on your 9.9-15HP outboard fails to retract fully, feels loose, or the recoil mechanism will not reset, a worn or broken rewind spring such as the 18-6511 is a likely cause.

Is the Sierra 18-6511 a genuine Sierra part or aftermarket? It is manufactured by Sierra and built to meet or exceed original equipment quality standards for a 9.9-15HP outboard rewind spring.

How much does the 18-6511 rewind spring weigh? This rewind spring weighs 0.29 pounds.

What color is the Sierra 18-6511 spring assembly? The Sierra 18-6511 rewind spring is white.

Can I install the 18-6511 myself or do I need a mechanic? Replacing a recoil starter rewind spring like the 18-6511 involves disassembling the manual starter housing, which requires care due to spring tension, so many owners with basic mechanical experience can do it, though those unfamiliar with recoil starters may prefer a marine mechanic.

What is the UPC for the Sierra 18-6511? The UPC for the Sierra 18-6511 rewind spring is 030999320346.

Will the 18-6511 work on outboards outside the 9.9-15HP range? The 18-6511 is specified for the 9.9 - 15HP range from 1974-1992; horsepower ratings outside this range are not covered by this part.