Replies to This Discussion

Permalink Reply by William Carter 3 hours ago

Not sure why my pictures rotated 90 degrees in the first post.

This morning I made some measurements to figure out what bolts I need.  Since the assembly instructions for this part of the newer kits does not include any dimensions I used calipers and tried to make the best measurements I could.  I made a couple of each part (while installed) and then took averages.  Added them up, converted them to fractions and found the nearest 1/16".

The lower Engine Mount Fitting:

Engine Mount Fitting = 0.0905"

Firewall Bottom Stiffener = 0.0420"

Firewall = 0.0250"

Firewall Side Stiffener = 0.0445"

Engine Mount = 0.1290"

Total = 0.3310" or 21/64" which is approximately 5/16" which would call for an AN6-7A.

The upper Engine Mount Fitting:

Engine Mount Fitting = 0.0905"

Firewall Rear Reinforcement = 0.0405"

Firewall = 0.0250"

Firewall Side Stiffener = 0.0445"

Firewall Top Stiffener = 0.0800"

Engine Mount = 0.1290"

Total = 0.4095" or 13/32" which is approximately 7/16" which would call for an AN6-10A.

The Cabin Frame Bolts:

Cabin Frame = 0.1280"

Firewall = 0.0250"

Upper Firewall Channel = 0.0400"

Firewall Top Stiffener = 0.0800"

Engine Mount = 0.1290"

Total = 0.3220" or 41/128" which is approximately 5/16" which would call for an AN4-6A.

If anyone sees any mistake or has any further advice please let me know.

• ▶ Reply