PSS Shaft Seal Set Screw Size

[Statat13]

2006 21i PSS Seal set screw size. I am going out to the boat this weekend, but need to figure out the size of the set screw for the stainless steel collar around the prop shaft. I didn’t get a chance to measure the prop shaft, so I’m unsure of that at the moment. I contacted PYI and they said there are 2 different size set screws for their seals: 1/4”-20 5/16” long, and 3/8”-16 3/8” tall. I’m pretty sure the stock seal is not a PSY product, so I’m trying to find the correct screw size for the stock seal collar from the factory.

[boatwakes]

They're 1/4-20, your shaft is 1 1/8". There are a total of 4 set screws for the PSS. Each set screw is backed by a second to lock it in place.

[Statat13]

Thanks for the info!