64 yachtwin3hp flywheel puller bolts

[LargemouthBass21]

Not sure what size I need. I have the small ones that bolt the thin metal cover on for reference but I’d like some numbers too. I know grade 8 but that’s about it. Also I heard somewhere 1/4” and 20 threads per inch but that may be for a different motor. I couldn’t find it for a 3hp like mine on the site anywhere but I could’ve missed it if there was a thread about it...
thanks!

 

[kbait]

Grade 8, 1/4” x 20 will fit most any omc 40hp and smaller, including your 3

 

[F_R]

1/4"-20 is correct.

 

[racerone]

Grade 5 bolts work for me on a 3 HP flywheel..