Title: Not a true Carter A68301 replacement
Product review: Bought this as an alternative to the Carter A68301 fuel safety switch. First off the Carter has a 1/8" threaded NPT fitting where this unit is 1/4" (not mentioned in the product description) so if your oil pressure port is 1/8" NPT like mine you will have to add some addition pipe fittings. The unit I received was defective or not a true substitute. The Sierra OP72533 has the same markings on the contacts as the Carter but the unit I received didn't have continuity between the P & S contact points. Not sure if this was an isolated case but the fact I had to add additional pipe fittings to make it work wasn't worth trying to exchange it for another unit. Without the P & S (normally closed) contact your fuel pump wont turn on until the boat is running. Not good when trying to start your boat with an empty carburetor bowl.
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