Yamaha F15 F20 F25 4-Stroke Starter Motor 12V 11T CCW | Replaces 6AH-81800-00-00

Starter motor for Yamaha F15, F20 and the new generation F25 four-strokes, an aftermarket replacement for 6AH-81800-00-00. Eleven teeth, counter-clockwise, 0.3kW. These are the portable engines on RIBs and tenders everywhere, and most of them live on a transom that gets dunked at the ramp.

OE Reference Numbers

Primary reference: 6AH-81800-00-00

Substitute references: 6AH-81800-01-00

Cross references reported by replacement part catalogs: Arrowhead SHI0191, J&N 410-44145, Lester 104-097, Hitachi S108-125

Buyer search terms: Yamaha F20 starter, 6AH-81800, Yamaha F25 starter, Yamaha F15 4-stroke starter

Reference Specifications

System voltage: 12V DC

Pinion: 11 teeth, counter-clockwise

Rated power: 0.3kW

Pinion OD: 33.2mm

Overall length: 202mm

Mounting: two 8.5mm holes and one slot, 80mm centres

Weight: about 2.25kg

These figures come from compatible replacement listings, not from Yamaha factory drawings. Match them against the removed unit before ordering.

Fitment and Purchase Checks

Yamaha F13.5B, F15C and F20B four-strokes, 2006 to 2022. The new lightweight F25 from 2017. Not the old F25 from 1998 to 2009, that one takes 65W-81800. Count eleven teeth and check the M6 stud terminal before ordering.

Why This Unit

Portables get carried, dropped, dunked. The M6 stud terminal corrodes first, clean it before you blame the motor. Copper windings, coated armature, sealed case. Light engine, light starter, treat the battery the same way and it starts every time.

For Buyers and Distributors

Six month warranty. 20 piece minimum. 10 to 15 days to ship. Test the unit on the boat before the season starts, not the morning you launch.

Aftermarket notice

This listing is an aftermarket replacement part supplied by StarterStock. We are not affiliated with, authorized by, or endorsed by any original equipment manufacturer. OE numbers, model names and brand names are quoted for identification and fitment matching only, and remain the property of their respective owners.