spark plug gap ?

[spider1]

Ok guys I just bought a set of new plugs for the 2005 300 hpdi and looked in the owners manual and it said to gap the plugs between 1.5 and 1.6 mm so I did and as I was installing them I see a tag on the motor to gap them between 0.5 and 0.7mm. Now I am confussed on which one it should be

Any ideas on which one it should be. I checked an old plug and it was at 1.3mm.

[21XDC]

I'd call hydrotec .... http://www.yamaha-rebuild.com/index.htm