I have 4.3L Carb 2005 (ex TKS- now Mercarb) and Ive rebuilt Carb and want to adjust it, before that i want to check if the timing is correct.
I think its Thunderbolt IV or V my s/n 0w326935, according to manual #25 i need to enter the Base Timing Mode right?
But wheres located that cable/wire...