Acorn To Arabella · video

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Accutech in Dover, New Hampshire performs a complete teardown, inspection, and reassembly of the Variprop feathering propeller from the sailboat Arabella.▶ 6:10 A technician disassembles the three-blade prop, glass-bead blasts marine growth from all components, inspects bearing journals and gear teeth, and checks pitch alignment using PropScan software.▶ 15:32 The prop's binding — which had prevented blade movement — traced to biofouling friction on the exterior, not internal wear; machining marks were still visible in the bearing journals, confirming minimal wear on a relatively new unit.▶ 23:07 The technician explains the Variprop's brake rings in detail: spring-loaded clips ground to a specific tension that slow blade transition between feather, forward, and reverse, preventing the impact-hammer shock loads that damage pitch stops and gears.▶ 14:21 He demonstrates how external pitch-stop screws allow infinite pitch adjustment and how SPW's factory alignment marks confirm correct pitch after reassembly.▶ 17:59 On antifouling, he advises against PropSpeed on feathering props — incorrect application disrupts blade operation — and recommends Pettit Prop Coat, a zinc-rich spray available at West Marine that can be touched up without full removal.▶ 10:01 Separately, Steve winterizes Arabella at a Newfoundland yacht club for a six-week absence, relying on electric heaters, shore power, an ice eater, and a neighbor named Andrew to check the boat every few days rather than draining lines or adding antifreeze.▶ 1:12 Biofouling buildup, not mechanical failure, is the most common cause of feathering-prop binding.

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