spark plugs

[JOHN NICHOLS]

what is the best plug for a 2005 200 hdpi spark plug and what gap

[boats.net]

VZ200 use NGK plug BKR6EKU gap .020-.028 in
Z200TL serial number 00-150689 use BKR7ES-10 at .039
Z200TL 150690- use BKR7EK-U1 at .039
Z200TX 00-102420 use BKR7ES-10 at 0.39
Z200TX 102421- use BKR7EK-U1 at .039

[rodbolt17]

prior to the 04 Z motor production run the best method is by looking at the ign coil primary connector,if one is gray use the EKU if both are black use the EKS.
there were some case by case issues that the coils and ECU's were replaced.
after the 04 run use the above chart. as far as I know all the VZ motors used the EKU.
there is a trick,coved by 2 tech bullitens, on setting the gap,correctly, on the EKU plugs.

[robert graham]

prior to the 04 Z motor production run the best method is by looking at the ign coil primary connector,if one is gray use the EKU if both are black use the EKS.
there were some case by case issues that the coils and ECU's were replaced.
after the 04 run use the above chart. as far as I know all the VZ motors used the EKU.
there is a trick,coved by 2 tech bullitens, on setting the gap,correctly, on the EKU plugs.

O.K., you got me!...what can be the "trick" to setting a plug gap?...curiosity of the cat!