Spark Plug Wire Kit 834365 875571 for Volvo Penta 4 Cyl AQ120 AQ125 AQ131 AQ140 18-8813-1
Spark Plug Wire Kit 834365 875571 for Volvo Penta 4 Cyl AQ120 AQ125 AQ131 AQ140 18-8813-1
Product Overview
Ignition spark plug wire kit for Volvo Penta four cylinder marine engines, the full lead set with four spark plug wires and one coil wire. It replaces Volvo Penta 834365 and 875571 and crosses to Sierra 18-8813-1, and the whole set ships in a 210 mm x 120 mm x 60 mm box.
It fits the AQ120B, AQ125A, AQ131A to AQ131D, AQ140A and AQ145A and AQ145B petrol fours. Those are the small four cylinder Volvo Penta inboards and sterndrives that have kept a lot of older boats running, and the ignition leads on them are usually the original set.
The core is Kevlar with a stainless steel wound conductor, and the jacket and boots are silicone. That combination is what a marine engine needs: the stainless winding holds its resistance when the leads get hot, the silicone boots do not go hard and crack, and the suppression keeps the ignition noise out of the radio and the electronics.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Spark plug wire kit, ignition lead set |
| Fits | Volvo Penta four cylinder AQ series |
| Core | Kevlar with stainless steel wound conductor |
| Jacket and Boots | Silicone, high temperature |
| Suppression | RFI suppression for sensitive electronics |
| Terminals | Stainless steel, spark plug and distributor ends |
| Net Weight | 463 g including packaging |
| Pack Size | 210 mm x 120 mm x 60 mm |
| Quantity | 4 spark plug wires and 1 coil wire |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Volvo Penta | 834365 |
| Volvo Penta | 875571 |
| Sierra | 18-8813-1 |
Compatible Engines
| Volvo Penta Model | Cylinders | Fuel | Note |
|---|---|---|---|
| AQ120B | 4 cylinder | Petrol | Pushrod four |
| AQ125A | 4 cylinder | Petrol | Overhead cam four |
| AQ131A, AQ131B, AQ131C, AQ131D | 4 cylinder | Petrol | Same lead set |
| AQ140A | 4 cylinder | Petrol | Same lead set |
| AQ145A, AQ145B | 4 cylinder | Petrol | Same lead set |
What's Included
| Component | Detail | Qty |
|---|---|---|
| Spark plug wires | Silicone jacket, stainless terminals | 4 |
| Coil wire | Silicone jacket, stainless terminals | 1 |
| Distributor cap and rotor | Not included, order separately | 0 |
Misfire or Bad Leads
| What You See | What It Means | What To Do |
|---|---|---|
| Misfire when the engine is hot | Lead breaking down with heat | Renew the set, check the boots |
| Rough idle that clears at speed | One lead or boot arcing | Run the engine in the dark and look for a blue arc |
| Radio clicks with the engine running | Suppression failed in a lead | Renew the set |
| Green corrosion in the boot | Water in the plug well | Renew the lead and dry the well |
| Hard starting when damp | Cracked silicone jacket | Renew the set before the season |
| Spark at the coil but not the plug | Open circuit in a lead | Meter each lead end to end |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the number on the old set, 834365 and 875571 are the same set |
| 2 | Battery off before touching the ignition side |
| 3 | Number the leads before removing them, one at a time is safest |
| 4 | Clean and dry the plug wells, corrosion there kills new boots |
| 5 | Fit the leads with the boots fully seated on the plugs |
| 6 | Route the leads away from the exhaust and the belts |
| 7 | Start the engine and listen for a steady idle on all cylinders |
| 8 | Check the coil wire is fully seated at both ends |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Before You Buy
- Fits Volvo Penta AQ120B, AQ125A, AQ131A-D, AQ140A and AQ145A-B four cylinder petrol engines
- Replaces 834365 and 875571, crosses to Sierra 18-8813-1
- The kit includes four spark plug wires and one coil wire
- Kevlar core, stainless wound conductor, silicone jacket and boots
- Distributor cap and rotor are not included
- Clean and dry the plug wells before fitting the new leads
- 30-Day Easy Returns
- Ships from our warehouse with tracking
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Before You Buy
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