need help identifying prop diameter
 

its a laser II 21p
prop numbers read like this:
EC quicksilver 48 16546 441 21p
any idea what the diameter is??

i ran a 15x19 solas ss three blade this weekend and it actually dropped 200 rpms and 4 mph from the laser II listed above

bump

Laser II 21" is 13.875", so you are probably loosing speed due to the larger dia. If you think there is more to gain, you should try a Enertia 20" or a vensura 21". On some boats, the vensura has turned out to be 1-1.5 mph faster than the Laser II.

Prop help
 

I have a 86 scarab panther with 2 502's. With trs drives.. Can't figure out what size props to use keeps spinning.. Any help?