30.
Try .032
there is no gapping needed
.039 - .043 in .99 - 1.09 mm
Depending on the type of plug, the gap for a 1990 Chevy 2500 pickup is between .045 and .060. The plugs should come pre gapped.
stock gap is .050 you should always recheck the gap, dont trust the store
the correct gap is .30
The gap is .28
The plug gap for the 1990 model, 100 hp Mercury outboard is .040 in.
The correct spark plug gap is .044
The correct gap is .034. Hope that helps.
.41 is the gap specified by the Haynes manual for the 1990 Geo Prizm.
Mind The Gap Films was created in 1990.