- Engine:
- G3412 (S/N: R7A1-UP; CTP1-UP; KAP1-UP; CRF1-UP)
- G3412C (S/N: 6ZM1-UP; 5KR1-UP; 9RR1-UP; 8LW1-UP)
Reference: Disregard the article that is referenced above. Refer to the following article.
Description of Change: A new air lines group and new carburetor groups improve the seal for air and gas at the joint between the air lines and the throttle assembly.
The new air lines group consists of two tube assemblies and a bellows assembly that replace the tube assembly that is a one piece design. The bellows assembly allows thermal expansion of the air lines without disturbing the joint at the top of the throttle assembly.
Two new carburetor groups include new more rugged throttle assemblies. The new throttle assemblies have larger bolt holes in the top joint faces in order to accommodate 1/2 inch fasteners. The new throttle assemblies use O-rings to seal the top and the bottom joint faces in order improve the sealing of the joint.
Adaptable To: The 229-8406 Air Lines Group is a direct replacement for the 112-9346 Air Lines Group. The 237-3971 Carburetor Group is a direct replacement for the 118-6379 Carburetor Group. The 237-3972 Carburetor Group is a direct replacement for the 214-2441 Carburetor Group.
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| Illustration 1 | g01008345 |
(1) Seals (2) Bolts (3) Washers (4) Nuts (5) Tube assembly (6) Tube assembly (7) Bolts (8) Washers (9) Nuts (10) Bellows assembly (11) O-ring seal (12) Throttle assembly (13) O-ring seal | |
Tighten bolts (2) and nuts (4) that retain bellows assembly (10) to the tube assembly (5) and (6). Evenly tighten the diagonally opposed bolts and nuts.
- Torque ... 55 ± 5 N·m (41 ± 4 lb ft)
| New parts in the 229-8406 Lines Group | |||
| Item | Qty | Part Number | Description |
| 1 | 2 | 229-5333 | Seals |
| 2 | 8 | 0S-1590 | Bolts |
| 3 | 16 | 5M-2894 | Washers |
| 4 | 8 | 9S-8752 | Nuts |
| 5 | 1 | 229-0758 | Tube Assembly |
| 6 | 1 | 229-0759 | Tube Assembly |
| 7 | 4 | 1A-1460 | Bolts |
| 8 | 8 | 5P-8245 | Washers |
| 9 | 4 | 1F-7958 | Nuts |
| 10 | 1 | 207-1364 | Bellows As |
| 11 | 1 | 9X-7371 | O-Ring Seal |
| New Parts in the 237-3971 Carburetor Group and the 237-3972 Carburetor Group | |||
| Item | Qty | Part Number | Description |
| 12 | 1 | 228-2629 | Throttle Assembly |
| 13 | 1 | 125-9794 | O-Ring Seal |