870690 Cap | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta distributor cap from the Ignition and Control Systems group, weighing 0.127 kg and listed for 25 applications across the AQ, BB, B, MD, MB and AQD engine series. It consolidates five earlier numbers — 233260, 243632, 239598, 870417 and 870422 — which were catalogued variously as a cover, a spare part and a distributor cap.

🚤 Compatibility

• Engine Family: AQ, BB, B, MD, MB, AQD

Full model list at the end of this description.

⚙️ Key Features

• 0.127 kg
• Consolidates five earlier numbers: 233260, 243632, 239598, 870417 and 870422
• 25 applications across six engine series
• Ignition and Control Systems group
• Also supersedes Volvo part number 241653

🔌 Function

Carries the high-tension spark from the rotor out to each plug lead in firing order, while keeping damp and salt air off the contacts.

⚠️ Common Signs of Failure

• Misfire or stumble that is worse in damp weather
• Hard starting after the boat has stood
• Blue tracking lines or a hairline crack visible inside the cap
• Green or white corrosion on the segment contacts
• Carbon dust inside the cap when it is opened

🛠️ Service Notes

• Renew the rotor arm and the HT leads with the cap; a new cap onto worn leads gives the same misfire back
• Because five earlier numbers now come to this cap, an engine listed under any of them takes this part

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 870690 → Supersedes 233260

OEM / Related Numbers

• 243632 earlier number superseded by this part
• 239598 earlier number superseded by this part
• 870417 earlier number superseded by this part
• 870422 earlier number superseded by this part
• 233260 earlier number superseded by this part

Aftermarket / Verified Equivalents

• Orbitrade: 18690

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta AQ130C, AQ130D, AQ130A, AQ130B
• Volvo Penta AQ170B, AQ170C, AQ170A
• Volvo Penta BB115A, BB115B, BB115C
• Volvo Penta BB170B, BB170C, BB170A
• Volvo Penta MB20A, MB20B, MB20C
• Volvo Penta AQ115A, AQ115B
• Volvo Penta 100S, 110S
• Volvo Penta AQ165A
• Volvo Penta AQD21A
• Volvo Penta B20
• Volvo Penta BB165A
• Volvo Penta MD21A