Drive Rubber Bellows 875512 for Volvo Penta AQ80 AQ100 AQ100B AQ100S 875827 18-2755
Drive Rubber Bellows 875512 for Volvo Penta AQ80 AQ100 AQ100B AQ100S 875827 18-2755
Product Overview
Drive bellows for Volvo Penta AQ80 and AQ100 series drives, the corrugated rubber boot that seals the drive shaft and universal joint at the transom shield. It replaces Volvo Penta 875512 and 875827 and crosses to Sierra 18-2755, it ships as one bellows with two stainless steel clamps in a 150 mm x 155 mm x 160 mm box at 374 g, and it fits the AQ80, AQ100, AQ100B and AQ100S engines on both AQ Drive and Sail Drive installations.
This is the seal that keeps the sea out of the boat. The drive shaft passes through the transom shield into the bell housing, and the bellows is the flexible joint that lets the drive trim and steer while the shaft stays sealed. Behind it sit the universal joint and the gimbal bearing, which are steel parts running in an aluminium housing with no oil of their own.
When the bellows perishes, the failure is quiet until it is expensive. A small split lets water into the bell housing while the boat is running, the gimbal bearing rusts, the universal joint loses its grease, and the first symptom the owner notices is usually a vibration or a rumbling noise rather than water in the boat.
Rubber bellows have a service life in years rather than hours. Ozone, sunlight and the constant flexing at the transom shield all harden the rubber, and the bellows that looks sound on the outside often cracks at the inner folds where the drive shaft passes through. That is why the part is replaced on age during a drive service, not only when a leak is found.
Fitment covers the Volvo Penta AQ80, AQ100, AQ100B and AQ100S engines on the AQ Drive, and the Sail Drive leg. The 875512 number is specific to these older AQ drives, so compare the number on the old bellows before ordering: the later 270, 280, 290 and SP drives use different bellows that will not seal on the AQ transom shield.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Drive bellows with clamps |
| Volvo Penta Part Numbers | 875512, 875827 |
| Sierra Cross Reference | 18-2755 |
| Fits | Volvo Penta AQ80, AQ100, AQ100B and AQ100S |
| Drive Types | AQ Drive and Sail Drive |
| Quantity | 1 bellows and 2 stainless steel clamps |
| Country Of Origin | Taiwan |
| Net Weight | 374 g including packaging |
| Pack Size | 150 mm x 155 mm x 160 mm |
| Pack Size In Inches | 5.91 in x 6.10 in x 6.30 in |
| Warranty | 3 year |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| Volvo Penta | 875512 |
| Volvo Penta | 875827 |
| Sierra | 18-2755 |
Compatible Engines
| Volvo Penta Engine | Drive Type | Note |
|---|---|---|
| AQ80 | AQ Drive | Direct fit |
| AQ100 | AQ Drive | Direct fit |
| AQ100B | AQ Drive | Direct fit |
| AQ100S | AQ Drive | Direct fit |
| Volvo Penta Sail Drive | Sail Drive | Drive bellows for the sail drive leg |
What's Included
| Component | Detail | Qty |
|---|---|---|
| Drive bellows | Corrugated rubber bellows for the drive shaft at the transom shield | 1 |
| Stainless steel clamps | Clamps for the bellows on the transom shield and the drive side | 2 |
| Gimbal bearing | Not included, inspect it while the drive is off | 0 |
| Universal joint | Not included, check it for play while the bellows is off | 0 |
| Bell housing gasket | Not included, order separately if the housing is being resealed | 0 |
Signs The Bellows Needs Replacing
| What You See | What It Means | What To Do |
|---|---|---|
| Water in the bell housing | Bellows split or clamp loose | Fit the new bellows and check the bearing |
| Rumbling from the transom | Gimbal bearing rusted by water | Fit the new bellows and replace the bearing |
| Vibration under power | Universal joint running without grease | Fit the new bellows and check the joint |
| Cracks at the inner folds | Rubber age hardened | Fit the new bellows |
| Grease washed out of the joint | Water past the bellows | Fit the new bellows and repack the joint |
| Bellows more than five seasons old | Rubber past its service life | Fit the new bellows at the next drive service |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Compare the number on the old bellows with 875512 before ordering |
| 2 | Pull the drive and drain any water out of the bell housing |
| 3 | Cut the old clamps off and prise the bellows off the transom shield |
| 4 | Clean the shield and the drive flange back to bare metal |
| 5 | Check the gimbal bearing and the universal joint before fitting anything new |
| 6 | Fit the bellows over the shield with the ribs fully seated and the drain hole at the bottom |
| 7 | Fit the two new clamps and tighten with the screws accessible from outside |
| 8 | Check the bellows for folds or pinches, refit the drive and align it before the boat goes back in |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | 3 year |
| Packaging | Boxed, 150 mm x 155 mm x 160 mm |
Before You Buy
- Replaces Volvo Penta 875512 and 875827
- Crosses to Sierra 18-2755
- Fits Volvo Penta AQ80, AQ100, AQ100B and AQ100S
- For AQ Drive and Sail Drive installations
- Sold with two stainless steel clamps
- Seals the drive shaft and universal joint at the transom shield
- 374 g with packaging, box 150 mm x 155 mm x 160 mm
- 30-Day Easy Returns
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Boat Owners' Review
Before You Buy
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