630 Jred HS257 Recirculating Carb.

[NCFarmboy]

Jonsered 630 Super 2 on my bench has a Tilltoson HS257A recirculating carb on it (pg.6 in IPL). Can't find any info on this carb. It's not listed on the Tilly website. Did run across info for kit. Popoff is 7 psi. Is this normal for this carb?? I'm thinking it should be higher.
Shep

 

[Adirondackstihl]

POP should be min of 12-15psi as per treemonkey

 

[NCFarmboy]

That's what I was thinking. Didn't know if low pop was due to recirculating deal.
Thanks,
Shep