Sierra 18-6454 50 Amp Alternator for Mercury
- Brand:
- Sierra
- Part no:
- 18-6454
Where to buy
View on Amazonpaid link
Specifications
- Output
- 50 amp
This is the Sierra 18-6454 alternator, a 50 amp unit for Mercury and Mercury Sport Jet use. It is listed for 2.5L engines. The 50 amp rating is the only electrical figure stated, and ignition protection is not mentioned. The 2.5L engine size is the one fitment figure, so confirm your engine before relying on it.
Our take
Rated 50 amp and listed for 2.5L engines, the 18-6454 gives a clear pair of numbers to check against the alternator on the engine now: output and engine size. Nothing is said about ignition protection, so look at that separately.