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Old 05-15-2019, 06:13 AM   #3
Westiculo
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City: Boston
Vessel Name: Rose Mary
Vessel Model: 42 Grand Banks Motoryacht - 1985
Join Date: Feb 2017
Posts: 271
I don't know many details, but I asked american diesel the same question; one of mine was broken off. It's for cold starts, helps it run rich. Completely unnecessary on most boat engines, mine are not currently wired up.
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