Oof, memories of sea ray nav/anchor light switch. You know the ones with a transom light and forward facing mast light?
A diode is necessary at the switch to not back feed current to entire circuit when only the anchor lite(s) is illuminated
I cannot any more fully explain post #17 other than it's statement
Sounds as you have had the rear cover off? Inspected/cleaned the linkage end and detent? Any water/corrosion present?
The water came from the sky. By leaving the hull plug in/not clearing the drain the precipitation was allowed to collect in the bilge, hence the boat sank on land
Land sinker. Remove garboard/hull plug(s) immediately after loaded onto a trailer/hauled out
Change oil/filter multiple times, replace the starter and any other electrical device/wiring that was saturated
TBI volvo ought to be mefi controlled
Pretty straightforward connection most often located near the fwd end of the wiring harness. Otherwise look near the ecm for said connection. Should have a weather cap in place
Someone from my past who's forgotten more about outboard motors that i could ever learn once told me "there's no nevers or always with boats"
Sometimes it's the coil, rare yes. But sometimes
It doesn't hurt anything to install a new, proper coil.
Tensioner assembly is mounted to the engine block. There is no adjustment save for releasing the tension to remove the belt using a 3/8" drive ratchet and appropriate socket, like 15mm?