Lycoming Engines
Valve Wizard fits most popular parallel and straight valve Lycoming (and Millennium equivalent) engines.
Note: Certain engine series variants are not compatible with the current line of Valve Wizard tools. Click here to download a PDF list of incompatible series variants.
Compatible Engine Series:
IO-390
O-235
O-290
O-320
IO-320*
O-360
IO-360
LO-360
TO-360*
LTO-360
AEIO-360
VO-360
IVO-360
HO-360
HIO-360
IMO-360
O-540
IO-540*
TIO-540*
AEIO-540
AIO-320
LIO-320
AEIO-320
LHIO-360
LIO-360
TIO-360*
O-435
VO-435
TVO-435
GO-435
GO-480
IGO-480
GSO-480
IGSO-480
LTIO-540*
IGO-540
IGSO-540
VO-540
TIVO-540
IO-720
Angle Valve Models
- IO-360: dash series A, C, D, J, K (200-hp family); also AIO-360-A/B; AEIO-360-A
- HIO-360: dash series A, C, D, E, F; LIO-360-C; LHIO-360-C/F
- TO/LTO-360-A; TIO-360-A; plus TO/TIO-360-C1A6D, -F1A6D
- IO-390 (all)
- IO-540 (top-exhaust angle-valve): dash series B, E, M, U
- TIO-540 (top-exhaust angle-valve): dash series A, S, T; plus TIO/LTIO-540-F, -J, -N, -R
- TIO-541-A; IGO/IGSO-540-B
- Angle-valve (down-exhaust) families: GO/VO/TVO-435; GO/GSO/IGSO-480; IO-540-A, -G, -K, -L, -P, -S, -AA; AEIO-540-L; TIO-540-W, -AE, -AH; TIO/LTIO-540-U, -V, -W; VO/IVO/TVO/TIVO-540; IGO/IGSO-540-A
- Other angle-valve callouts: IO-540-AC1A5; TIO-540-AJ1A; TIO/TIGO-541-D/E
- IO-580/AEIO-580 (all)
- IO-720 (all; A/D are down-exhaust, B/C top-exhaust)
Parallel Valve Models
- O-235 (all)
- O-290; O/IO/LIO-320; AIO/AEIO-320; O-340
- O-360: dash series A, B, C, D, F, J (carbureted 180-hp family)
- IO-360: dash series B, E, F, L, plus IO-360-M1A (180-hp parallel-valve injected)
- LO-360-A; AEIO-360-B/H; HO-360-A/B; HIO-360-B; VO/IVO-360
- O-540: dash series A, B, E, F, G, H, J, L, V (235–260 hp)
- AEIO-540-D
- IO-540: dash series C, D, J, N, R, T, W, V, AB (250–270 hp “parallel-valve 540s”)
- TIO-540: dash series C, E, G, H, K, AA, AB, AF, AG; LTIO-540-K (parallel-valve turbo’d 540s)
Lycoming Angled (LA-1)
$169.00
Lycoming Parallel (LP-1)
$169.00