Sierra 18-6844 Alternator for MerCruiser
- Brand:
- Sierra
- Part no:
- 18-6844
Where to buy
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A new Sierra replacement alternator, part number 18-6844, for MerCruiser engines. It is built to match the original output or better, and it carries the Sierra warranty. Marine flame arrestor screens close off open sparks, and a wiring harness is included where the application needs one. The stated fit is Mercury/Denso.
Our take
The flame arrestor screens are the feature that matters in an engine space, because they close off open sparks that could start a fire. Output is claimed to match or beat the original, though no amp figure is given for this unit.