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

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

GHMarine cone-clutch exhaust bellows — CSKU 18BK002 — for select OMC / Volvo Penta cone-clutch sterndrives. Primary OEM 3850426 (single exhaust bellow). Related 767724 only when the EPC supersession chain explicitly lists it. Cross-refs 18-1074, 89190 (only when tied to 3850426 / cone-clutch), 9-72711, 85426 / 85426P.

This is a service-pack / sales-pack CSKU for the same core bellow 3850426 — not a complete transom seal kit. Sister single-bellow CSKU 17B1010 also sells 3850426 — match the CSKU / package you stock. Need clutch-dog Cobra exhaust 914036 (about 1986–1993) → a different path, not this page. Need U-joint 3854127 → GH 18B1002 / 18B5002. Need shift 911826 → GH 18B1001. Need gimbal bearing 3853807 → GH 20GK001 / 18BK5002.

Which bellow is this?

It is the rubber exhaust bellow on select cone-clutch OMC / Volvo Penta sterndrives whose parts record shows 3850426. Confirm the old bellow or EPC before you order.

It is not clutch-dog Cobra exhaust 914036 / 18-2764, not U-joint 3854127, not shift-cable 911826, not gimbal bearing 3853807, and not a multi-bellow + bearing transom mega-kit.

Signs yours is due

• Cone-clutch exhaust bellow is cracked, collapsed, or heat-glazed — stamped 3850426 / 18-1074 when readable.
• Stern exhaust leak / water intrusion at the exhaust bellow while the U-joint bellow still looks serviceable.
• You almost ordered 914036 / 18-2764 because the chart said "Cobra exhaust" — stop; that is the clutch-dog 1986–1993 path, not 3850426 cone-clutch.
• Divert: same 3850426 single CSKU → GH 17B1010. U-joint → GH 18B1002. Shift → GH 18B1001. Bearing → GH 20GK001.

Will it fit my drive?

This bellow is Compatible with select OMC / Volvo Penta cone-clutch sterndrives about 1994 & up that specify 3850426. Compatible with select Volvo SX representative drive codes when catalog/EPC lists 3850426 (verify drive code — do not use HP alone). Clutch-dog Cobra 1986–1993 / 914036 is not a positive fit on this page.

*Final fit = OEM 3850426 on the old bellow or EPC — not Cobra clutch-dog 1986–1993, and not HP-only shopping.

OEM & swap numbers

Primary OEM 3850426. Related 767724 only when EPC ties it. Cross-refs 18-1074, 89190 (cone-clutch / 3850426 only), 9-72711, 85426 / 85426P.

Wrong part? Read before you order

• NOT clutch-dog exhaust 914036 / 18-2764
• NOT U-joint 3854127 (GH 18B1002 / 18B5002)
• NOT shift-cable 911826 (GH 18B1001)
• NOT gimbal bearing 3853807 (GH 20GK001 / 18BK5002)
• NOT a full Bravo/Alpha MerCruiser transom multi-bellow kit
• NOT a kit photo with U-joint bellow + bearing + gaskets as BOM

What ships in the box

• 1 × Cone-clutch exhaust bellow (3850426 family)
• Clamps / hardware when supplied — confirm against your package

Gallery note: "18bk002-wps" multi-piece kit photos (U-joint-looking bellow + exhaust + bearing + gaskets) are not this CSKU's BOM. Upload only after a real single 3850426 exhaust bellow photo is available.

Often ordered with related SKUs

• Same 3850426 single path → GH 17B1010
• U-joint 3854127 → GH 18B1002 / 18B5002
• Shift 911826 → GH 18B1001
• Gimbal bearing 3853807 → GH 20GK001 / 18BK5002

Install tips on the exhaust bellow

Cone-clutch exhaust bellow work on the sterndrive. Cold engine; disconnect battery; support the drive per the service manual. This is one exhaust bellow — not a full multi-bellow transom overhaul script.

1. Match OEM 3850426 / 18-1074 on the old exhaust bellow before removal; photograph clamp / orientation.
2. Access the exhaust bellow per the service manual for your cone-clutch drive; clean mating surfaces.
3. Seat the new bellow fully without twist; place clamps on the clamp lands.
4. Use the adhesive / procedure specified for this exhaust bellow in the service manual.
5. Reassemble, then check for water / exhaust leaks before returning the boat to service.

FAQ

Is 18BK002 a full transom seal kit?

No. Dual-table identity is one 3850426 exhaust bellow (+ clamps only if your package shows them).

Is 18BK002 the same as 17B1010?

Same primary OEM 3850426. This page is CSKU 18BK002 (service-pack / sales-pack path). Match the CSKU you stock.

Will 914036 / 18-2764 interchange here?

No. That is the clutch-dog Cobra exhaust path about 1986–1993 — not cone-clutch 3850426.

Does 89190 always equal 3850426?

Only when the catalog ties 89190 to the 3850426 cone-clutch application. Match by OEM number.

Do kit photos mean bearing and U-joint bellow ship too?

No. Those gallery images are over-BOM contamination.

SX year tag alone — enough?

No. Confirm 3850426 on EPC / drive code for that SX package.

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 OEM number, drive type, EPC, CSKU, and package contents before ordering.