OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Robin Subaru Engines Thread diameter/pitch on Robin Subaru fuel tank?

Hi vint_mow,

The most common metric bolts are fine and coarse ,common fine is 1.25 mm pitch and common coarse is 1.5 mm pitch

I'd be very surprised if the bolts aren't 8mm x 1.25 mm

I usually just look at a metric thread and can tell if it's 1.25 or 1.5

I don't have a later model Robin motor here but may have an old one to check and get back here.

Cheers
Max.