190252 O-Ring | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta o-ring is an elastomeric sealing ring sized for the specified groove, bore and fluid service used in the manual-starter and sensor/dipstick sealing point. It is manufactured to the original Volvo Penta dimensional, material and interface requirements so the serviced assembly retains its designed alignment, sealing, load capacity and operating reliability. In service, it seals the selected shaft, plug or sensor connection against oil, moisture or air leakage. Selection must be confirmed by OEM part number 190252, the exact engine or product model, serial number and installed configuration.

🚤 Compatibility

Typically suits:

• Volvo Penta MD1B
• Volvo Penta MD2B
• Volvo Penta AQD2B

• Engine Family: MD, AQD

⚙️ Key Features

• Genuine Volvo Penta OEM o-ring
• OEM part number 190252
• Clean the groove, lubricate with a compatible fluid and avoid twisting, stretching or cutting the O-ring during assembly.

🔌 Function

Seals the selected shaft, plug or sensor connection against oil, moisture or air leakage. Clean the groove, lubricate with a compatible fluid and avoid twisting, stretching or cutting the O-ring during assembly.

⚠️ Common Signs of Failure

• Fluid seepage or air entry at the sealed joint
• Flattening, hardening or loss of elastic recovery
• Cuts, nicks, extrusion or spiral twisting
• Swelling, softening or cracking from incompatible fluid or heat
• Recurring leakage caused by a corroded groove or damaged mating surface

🛠️ Service Notes

• Always fit a new O-ring — never refit one that has been removed, as it has already taken a set in its groove
• Clean the groove and both sealing faces and check them for nicks, scoring and corrosion pitting; a damaged groove will leak however good the new seal is
• Smear the ring with a little clean lubricant compatible with the fluid it seals, then roll it into place by hand so it sits untwisted and fully in its groove
• Never lever an O-ring over a sharp edge or thread with a screwdriver; use a blunt plastic tool and protect any edge the ring has to pass
• Assemble the joint squarely and tighten to the figure and sequence given in the workshop manual for your engine — over-tightening extrudes the ring and causes the very leak you were curing

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 803371 manual-starter repair component
• 3886600 related seal

📦 Condition

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