Volvo Penta Conversion Gasket Set – Fits Volvo Penta AQ165/AQ170 Series (Replaces 876306, 875403)

Name: Volvo Penta Conversion Gasket Set – Fits Volvo Penta AQ165/AQ170 Series (Replaces 876306, 875403)
Brand: Sea Sierra
SKU: 876306
Price: 189.95 USD
Availability: InStock

$189.95 $303.00

Shipping calculated at checkout.

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You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

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Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This is a complete Volvo Penta Conversion Gasket Set designed for the lower engine block of Volvo Penta AQ165A and AQ170A/B/C series inline 6-cylinder gasoline marine engines manufactured between 1968 and 1978. It contains the necessary gaskets for rebuilding and sealing the lower end of the B30 engine block.

This gasket set is a direct replacement for Volvo Penta part numbers 876306 and 875403, and it also interchanges with Sierra 18-2814.

Installation Location: Engine Lower End
Compatible Fuel Type: Gasoline
Engine Application: For B30 inline 6-cylinder engines

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Volvo Penta	876306
Volvo Penta	875403
Sierra	18-2814

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This conversion gasket set is designed exclusively for the following Volvo Penta inline 6-cylinder models.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Volvo Penta	AQ165A	165	4-Stroke	1968–1969	876306
Volvo Penta	AQ170A	170	4-Stroke	1969–1972	876306
Volvo Penta	AQ170B	170	4-Stroke	1972–1973	876306
Volvo Penta	AQ170C	170	4-Stroke	1973–1978	876306

Technical Specs

Product Type: Conversion Gasket Set
Installation: Engine Lower End
Fuel Type: Gasoline
Other Technical Attributes: For B30 inline 6-cylinder engines
Dimensions: 76.0 x 26.5 x 3.5

What’s in the Box

1 x Conversion Gasket Set (Replaces 876306, 875403)

Installation Notes

Always disconnect the battery and ensure the engine is cool before starting work.
Drain engine fluids, including oil and coolant, into appropriate containers.
Carefully remove any external components blocking access to the engine's lower end.
Remove the old gaskets and meticulously clean all mating surfaces. Ensure they are free of old gasket material, sealant, oil, and debris.
Position the new gaskets correctly according to your engine's service manual. Do not use sealant unless explicitly specified for a particular gasket.
Reassemble all components, tightening fasteners in the correct sequence and to the manufacturer's recommended torque specifications.
Refill the engine with fresh oil and coolant.
Reconnect the battery, start the engine, and carefully check for any leaks around the newly sealed areas.

Troubleshooting & FAQ

How do I know if this gasket set fits my engine?

This set is specifically for Volvo Penta AQ165A and AQ170 (A/B/C) models with the inline 6-cylinder B30 gasoline engine. Please verify your model and year range against the "Engine & Model Compatibility" table. Do not use it for other engine series.

What are common signs of a failing lower engine gasket?

Symptoms include external oil or coolant leaks from the engine block, coolant in the oil (creamy or milky appearance on the dipstick), or oil in the coolant. Overheating can also be a sign of a compromised gasket.

Is any additional sealant required with these gaskets?

In general, these gaskets are designed to be installed dry. However, always consult your specific engine's official service manual. Some applications may call for a light application of sealant in specific areas, like corners or joint intersections.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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