3850426 Cone-Clutch Exhaust Bellows · Fits OMC / Volvo Penta SX select 1994-up, Replaces 18-1074, 89190, 9-72711

3850426 Cone-Clutch Exhaust Bellows · Fits OMC / Volvo Penta SX select 1994-up, Replaces 18-1074, 89190, 9-72711

GHMarine cone-clutch sterndrive exhaust bellow — OEM 3850426, sold as a single exhaust bellow. Cross-refs 18-1074, 89190, 9-72711, 85426 / 85426P. OMC 767724 only when your EPC supersession chain lists it.

This is not the older clutch-dog Cobra exhaust 914036 / 18-2764 (about 1986–1993), not a U-joint bellow, and not a complete transom seal kit with bearing and multiple boots. Clamps when supplied — confirm against your package.

Which bellow is this?

It is the exhaust bellow on select OMC / Volvo Penta cone-clutch sterndrives (catalog about 1994 & up) and select Volvo SX codes when EPC lists 3850426. Match the old bellow number and drive platform — not horsepower.

It is not clutch-dog Cobra exhaust 914036, not U-joint bellow 3854127, not shift-cable bellow 911826, not AQ without-flapper 876631 (GH 17B1008), and not a gimbal-bearing / multi-bellow kit.

Signs yours is due

• Cone-clutch / SX exhaust bellow (1994-up style) is cracked, soft, or heat-glazed — stamped 3850426 / 18-1074 when readable.
• Exhaust soot or water marks at the cone-clutch exhaust bellow joint after heat cycles; the U-joint boot and shift bellow still look fine.
• You almost ordered 914036 / 18-2764 because an old Cobra chart listed 1986–1993 — stop: that is the clutch-dog platform, not this bellow.
• Divert: need U-joint 3854127 → that family (not this page). Shift bellow 911826 → GH 18B1001. AQ without-flapper 876631 → GH 17B1008.

Will it fit my drive?

This exhaust bellow is Compatible with select OMC / Volvo Penta cone-clutch sterndrives whose parts record specifies 3850426 (catalog band about 1994 & up), and with select Volvo SX representative codes when EPC lists 3850426. Drive model + original part number decide fit — HP or a 1986–1993 Cobra clutch-dog chart does not.

*Representative catalog start for the cone-clutch platform. Final fit = OEM 3850426 on the old bellow or EPC — not Cobra 1986–1993 clutch-dog charts.

OEM & swap numbers

Primary OEM 3850426. Cross-refs for this cone-clutch family: 18-1074, 89190 (only on 3850426 / cone-clutch), 9-72711, 85426 / 85426P.

Wrong part? Read before you order

• NOT clutch-dog Cobra exhaust 914036 / 18-2764 (~1986–1993)
• NOT U-joint bellow 3854127
• NOT shift-cable bellow 911826 (GH 18B1001)
• NOT AQ without-flapper 876631 (GH 17B1008)
• NOT gimbal bearing 3853807 or a multi-bellow transom kit
• NOT a complete seal kit with bearing + U-joint + exhaust in one box

What ships in the box

• 1 × Cone-clutch exhaust bellow (3850426 family)
• Clamps when supplied — confirm quantity against your package (not a fixed multi-part kit BOM)

Often ordered with related SKUs

• U-joint bellow 3854127 family → confirm that SKU separately (do not assume it ships here)
• Shift-cable bellow → GH 18B1001
• AQ exhaust without flapper → GH 17B1008

Install tips on the cone-clutch exhaust bellow

Single exhaust-bellow service on a cone-clutch / SX drive. Cold engine; disconnect battery; follow the OMC / Volvo Penta service method for your drive. This is one exhaust bellow — not a full transom kit job with gimbal bearing and multiple boots. Use adhesive / expander only if your drive manual requires it for this joint — do not copy a multi-boot kit recipe blindly.

1. Confirm old part 3850426 / 18-1074 on a cone-clutch platform — not 914036 / 18-2764 clutch-dog.
2. Support the joint; mark orientation; remove the old bellow per the drive manual.
3. Clean mating surfaces; seat the new bellow fully without twist; install clamps if supplied in your package.
4. Tighten / cure per the service procedure for that drive (no universal torque invented on this page).
5. Run and check for exhaust / water leaks before returning the boat to service.

FAQ

Is this the same as 914036 / 18-2764?

No. Those are the older clutch-dog Cobra exhaust family (~1986–1993). 17B1010 is 3850426 for select cone-clutch / SX applications about 1994-up.

Is this a complete transom seal kit?

No. This page is one exhaust bellow only. It does not include U-joint bellow, shift bellow, gimbal bearing, or gaskets.

Will any SX / Cobra exhaust bellow fit?

No. Confirm 3850426 on the old bellow or EPC and the cone-clutch platform. Model name or horsepower alone is not enough.

Is 89190 always the same as 3850426?

Only when the catalog ties 89190 to the 3850426 cone-clutch application. Do not use 89190 as a free-floating substitute across platforms.

Are clamps included?

Clamps may ship with the bellow — confirm against your package. This page does not promise a fixed multi-hardware kit.

Do I replace the U-joint bellow at the same time?

Only if that part is also due. U-joint 3854127 is a different SKU — it is not included in this box.

Please note

Aftermarket replacement by GHMarine. Not affiliated with engine manufacturers named above. "Compatible with", "Replaces", and cross-ref numbers identify the 3850426 cone-clutch exhaust bellow family — always confirm platform, EPC, and package contents before ordering.