876631 Exhaust Bellows without Flapper · Fits Volvo Penta AQ200–290 select drives, Replaces 18-2758, 89020, 9-72708

876631 Exhaust Bellows without Flapper · Fits Volvo Penta AQ200–290 select drives, Replaces 18-2758, 89020, 9-72708

GHMarine AQ exhaust bellow — OEM 876631, sold as a single bellow without an internal water flapper. Cross-refs 18-2758, 89020, 9-72708, REC876631 / RM876631. Legacy 875848 only when your old-part chain confirms the without-flapper structure.

This page is not the with-flapper brother (876633 / 875828 — GH 25B1095 / 19B5001). Clamps, if present in your package, are installation hardware — not an OEM kit parent number. Confirm contents against your package.

Which bellow is this?

It is the AQ drive exhaust bellow (without internal flapper) used on select Volvo Penta AQ200–290 family layouts that specify 876631. Look inside the old bellow: if you see a built-in flapper, you are on the wrong page.

It is not with-flapper 876633 / 89010, not U-joint bellow 876294, not transom / drive-joint kit 875826, not shift-cable bellow 911826, and not the combo pack GH 18B2001 (876631 + 876294).

Signs yours is due

• AQ exhaust bellow is cracked, soft, or heat-glazed — and the old part has no internal flapper (876631 / 89020 family).
• Exhaust soot or water marks at the AQ bellow joints after heat cycles; the U-joint boot and seawater hose still look fine.
• You almost ordered 876633 because the outside looks similar — stop and check for an internal flapper before checkout.
• Divert: with internal flapper → GH 25B1095 / 19B5001. Need bellow + U-joint together → GH 18B2001. U-joint only → 876294 family pages.

Will it fit my drive?

This without-flapper exhaust bellow is Compatible with select Volvo Penta AQ200 / AQ250 / AQ270 / AQ275 / AQ280 / AQ280DP / AQ290 / AQ290DP drives when the parts record specifies 876631 (without flapper). Drive model + original part number decide fit — horsepower or a guessed year band alone does not.

Final fit = OEM 876631 without-flapper structure on the old bellow or EPC. Do not order from a hard-coded year range alone.

OEM & swap numbers

Primary OEM 876631 (without flapper). Verified-style cross-refs for this structure: 18-2758, 89020, 9-72708, REC876631 / RM876631.

Wrong part? Read before you order

• NOT with-flapper bellow 876633 / 875828 / 89010 (GH 25B1095 / 19B5001)
• NOT U-joint bellow 876294
• NOT transom / drive-joint kit 875826
• NOT shift-cable bellow 911826
• NOT combo 876631+876294 — that is GH 18B2001
• NOT SX/DPH later exhaust kits or saildrive thru-hull membranes

What ships in the box

• 1 × Exhaust bellow without internal flapper (876631 family)
• Clamps / small clips: not locked as a fixed outbound BOM on this page — confirm against your package (do not assume worm-gear hose clamps)

Often ordered with related SKUs

• Same look but WITH flapper → GH 25B1095 / 19B5001
• 876631 + U-joint 876294 combo → GH 18B2001
• AQ seawater intake hose → GH 18H1002

Install tips on the AQ exhaust bellow

AQ drive exhaust-bellow service. Cold engine; disconnect battery; follow the Volvo Penta service method for your drive. Confirm the replacement is without flapper before you open the joint. Use the adhesive / expander method only if your AQ service manual requires it for this bellow — do not copy a MerCruiser transom-boot recipe blindly.

1. Confirm old part 876631 / 89020 without flapper — not 876633 / 89010.
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 any clamps/clips supplied in your package.
4. Tighten / cure per the Volvo Penta 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

Does this bellow include an internal flapper?

No. 17B1008 is 876631 without flapper. If your old bellow has a built-in flapper, see GH 25B1095 / 19B5001 (876633 / 875828).

Is 876633 / 89010 a replacement for this?

No. Those are the with-flapper structure. Do not treat 89020 and 89010 as interchangeable.

Will any AQ280 / AQ290 bellow fit?

No. Confirm 876631 without-flapper on the old part or EPC. Model name alone is not enough.

Is this the same as 18B2001?

No. 18B2001 is a combo (876631 + 876294). This page is the single without-flapper exhaust bellow only.

Does the title include clamps?

No. This page does not promise clamps in the title. Check your package for whatever hardware actually ships.

What about old number 875848?

Use it only when your old-part / supersession chain confirms the without-flapper structure. It has appeared on conflicting chains — do not assume.

Please note

Aftermarket replacement by GHMarine. Not affiliated with engine manufacturers named above. "Compatible with", "Replaces", and cross-ref numbers identify the 876631 without-flapper family — always confirm structure, drive model, EPC, and package contents before ordering.