Here is a list of the prop spacer recommendations from SPA by the Engine type. For Jabiru engine info please see Jabiru NA directly.
Engine /mount bushing type |
Spacer Thickness |
Engine Side Prop Flange |
Propeller Flange |
TCM O-200 With original bushings |
1.875" Thick |
SAE-1, 3/8 bolts |
SAE-1, 3/8 bolts |
TCM O-200 With adapter cones / bushings |
2.375" thick |
SAE-1, 3/8 bolts |
SAE-1, 3/8 bolts |
TCM O-240 with OEM bushings |
2" thick |
ARP-502 |
SAE-2, 3/8 bolts |
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Franklin 4B-235 With Adapter cones/ bushings |
2" thick |
ARP-502 |
SAE-2, 3/8 bolts |
Lycoming |
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Note: Verify prop flange type and bolt dia. And distance to fire wall , See suggestions below |
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Some O-235 |
1.25" |
SAE-1, 3/8 bolts |
SAE-2, 3/8 bolts |
Some O-235 |
1.25" |
SAE-2, 3/8 bolts |
SAE-2, 3/8 bolts |
O-320 /290 |
1.25" |
SAE-2, 3/8 bolts |
SAE-2, 3/8 or 7/16 bolts per propeller manufacturer recommendation |
O-320 |
1.25" |
SAE-2, 7/16 bolts |
SAE-2, 3/8 or 7/16 bolts per propeller manufacturer recommendation |
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UL Engines |
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SPA will provide proper propeller flange length for UL engines when ordering your engine package |
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