Sierra 18-18100 Serpentine Belt
- Brand:
- Sierra
- Part no:
- 18-18100
Where to buy
View on Amazonpaid link
This is a Sierra serpentine belt, part number 18-18100, made as a replacement for Mercury part 57-828507Q4. No belt length or rib count is given, so rely on the part numbers: match 18-18100 or the Mercury number 57-828507Q4 against what is on your engine before fitting. That is all the maker states about it, so a careful match by number is the safe route.
Our take
The Mercury cross-reference 57-828507Q4 is the key detail of this Sierra 18-18100 serpentine belt, because no length is stated. Compare that number with the belt on your engine rather than guessing by sight.