My Z18 crank lasted 8 months and was replaced as others who posted same the same issue 2021-22 boats….got replacement but been shopping for a better replacement….
my replacement #1 from boat dealer is 925 CCA with double posts and may last years BUT
local battery place has what seems to be a new Interstate 31 crank termed the AGM-7 with same 925CCA for $299 with a nice 3 year warranty. Battery place is 10x closer than the boat dealer.
One BBC guy said his 2nd replacement lasted only 4 months like his first failure soooo any opinions on buying the AGM-7 which seems the latest crank version???