GROCO 1-1/2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1500-W] Brand_Perko By selecting the right tach

By selecting the right tach and setting the switch on the back to the correct position you let the tachometer know how many pulses are sent per each engine revolution

and an optional focus tube to allow use on boats with planing hulls when the vessel spends a significant amount of time with the bow pitched up

creating air pockets and providing a slicker surface

the transfer relay switches to inverter at the correct place in the wave form

F-7 - 15" x 41" - Double Layer - Black

GROCO 1-1/2" Bronze Extra Long Thru-Hull Fitting w/Nut [THXL-1500-W] Brand_Perko By selecting the right tach1 1 2" Bronze Extra Long Thru Hull Fitting w Nut Features: Extra long NPSM NPT combination thread C83600 Bronze Specifications: Hose Size: 1 1 2" Material: Bronze Box Dimensions: 3"H x 3"W x 6"L WT: 1. 65 lbs UPC: 742985141773