Just so you know, not all Suzuki Watergrips have the brand name stamped on their hub. There was a run of Watergrips that just had the diameter and pitch stamped on the hub in the normal manner but no mention of WG
Here’s a close up of a 16 x 18.5”
In my experience, the “1903” and “1904” stamped on the spline collar seems to correlate with the fact that the prop is indeed a WG (just my experience—-never had that confirmed by a prop shop or by Suzuki so take with a grain of salt; there might be other numbers stamped to confirm it’s a WG)
I have a pair of 16x18.5 “ props on my twin DF300’s and neither has WG stamped on them but I have received multiple confirmations that they are in fact WG’s
It’s important to understand and take clear note of the difference—-you CANNOT take a non- WG propeller and just swap it out with a WG propeller (or vice-Versa)
You’ll need a special hub to place on the shaft when installing a WG prop in place of Non-WG prop—-there’s a space nut that has to be installed
The link to a YT vid below shows this clearly
View attachment 106256
https://na01.safelinks.protection.outlook.com/?url=https://youtu.be/6hq4A2i3mes?si=lsvXE86-iPZPuUWY&data=05|02||1427c887974e49b9490808dc76b69c81|84df9e7fe9f640afb435aaaaaaaaaaaa|1|0|638515773958438968|Unknown|TWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=|0|||&sdata=H/hst/FByHJD5KY1v6wm3jDVbPcXB8tnLbv8VH0M81I=&reserved=0