Starter Motor – Fits Volvo Penta AQ120/125/131/145/151/171 & 2001/2002/2003 Series (Replaces 873549, 834339)
Starter Motor – Fits Volvo Penta AQ120/125/131/145/151/171 & 2001/2002/2003 Series (Replaces 873549, 834339) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Starter Motor – Fits Volvo Penta AQ120/125/131/145/151/171 & 20...
Product Details
This aftermarket Starter Motor – Fits Volvo Penta AQ120/125/131/145/151/171 & 2001/2002/2003 Series is engineered for a wide range of Volvo Penta engines. It is compatible with gasoline models in the AQ60 through AQ171 series (1960–1994) and diesel models in the 2001, 2002, and 2003 series (1983–1993).
It serves as a direct interchange for Volvo Penta part numbers 873549, 834339, 834976, 840808, 859553, and 870977, as well as aftermarket references from WAI, Bosch, and Marelli.
- Installs as a direct OEM-style replacement.
- Compatible with both gasoline and diesel 12V systems.
- Engineered as a Permanent Magnet Gear Reduction (PMGR) unit for high-torque starting.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 873549 |
| Volvo Penta | 834339 |
| Volvo Penta | 834976 |
| Volvo Penta | 840808 |
| Volvo Penta | 859553 |
| Volvo Penta | 870977 |
| WAI | SPR0006 |
| Bosch | 0001311103 |
| Marelli | MSR385 |
| Marelli | MSR409 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This starter fits a broad range of Volvo Penta gasoline engines from the AQ, BB, and MB series (1960–1994) and diesel engines from the 2001, 2002, and 2003 series (1983–1993).
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| Volvo Penta | AQ60 | 1960–1962 | 873549 | |
| Volvo Penta | AQ90 | 1962–1964 | 873549 | |
| Volvo Penta | AQ95, AQ95A | 1964–1968 | 873549 | |
| Volvo Penta | AQ100 | 1961–1963 | 873549 | |
| Volvo Penta | AQ105A | 1968–1969 | 873549 | |
| Volvo Penta | AQ110 | 1963–1966 | 873549 | |
| Volvo Penta | AQ115A/B/C | 1969–1977 | 873549 | |
| Volvo Penta | AQ120/B | 1966–1980 | 873549 | |
| Volvo Penta | AQ125/A/B | 1981–1985 | 873549 | |
| Volvo Penta | AQ130/A/B/C/D | 1968–1977 | 873549 | |
| Volvo Penta | AQ131A/B/C/D | 1985–1989 | 873549 | |
| Volvo Penta | AQ140A | 1975–1979 | 873549 | |
| Volvo Penta | AQ145A/B | 1979–1985 | 873549 | |
| Volvo Penta | AQ151A/B/C | 1985–1989 | 873549 | |
| Volvo Penta | AQ165A | 1968–1969 | 873549 | 6-cylinder |
| Volvo Penta | AQ170/A/B/C/D | 1969–1980 | 873549 | 6-cylinder |
| Volvo Penta | AQ171A/C | 1986–1994 | 873549 | |
| Volvo Penta | AQ251, AQ251A | 1989–1992 | 873549 | DOHC 2.49L/152CI |
| Volvo Penta | BB100A | 1963–1969 | 873549 | |
| Volvo Penta | BB115A/B/C | 1969–1977 | 873549 | |
| Volvo Penta | BB145A | 1979–1985 | 873549 | |
| Volvo Penta | BB165A | 1965–1969 | 873549 | 6-cylinder |
| Volvo Penta | BB170/A/B/C | 1969–1978 | 873549 | 6-cylinder |
| Volvo Penta | MB18B/D/F | 1963–1975 | 873549 | |
| Volvo Penta | MB20A/B | 1969–1975 | 873549 | |
| Volvo Penta | 2001 | 1983–1993 | 873549 | 1-cylinder |
| Volvo Penta | 2002 | 1983–1993 | 873549 | 2-cylinder |
| Volvo Penta | 2002T | 1983–1993 | 873549 | 2-cylinder, turbocharged |
| Volvo Penta | 2003 | 1983–1993 | 873549 | 3-cylinder |
| Volvo Penta | 2003R | 1983–1993 | 873549 | 3-cylinder |
| Volvo Penta | 2003R S | 1983–1993 | 873549 | 3-cylinder |
| Volvo Penta | 2003R S Turbo V | 1983–1993 | 873549 | 3-cylinder, turbocharged |
| Volvo Penta | 2003S | 1983–1993 | 873549 | 3-cylinder |
| Volvo Penta | 2003S Turbo | 1983–1993 | 873549 | 3-cylinder, turbocharged |
| Volvo Penta | 2003T | 1983–1993 | 873549 | 3-cylinder, turbocharged |
| Volvo Penta | 2003V | 1983–1993 | 873549 | 3-cylinder |
Technical Specs
- Product Type
- Starter Motor
- Installation
- Direct OEM replacement
- Fuel Type
- Compatible with gasoline and diesel engines
- Connection
- Electrical: 12V
- Housing Material
- Metal
- Dimensions
- 33.0 × 19.0 × 13.0 cm
- Weight
- 8.15 pounds (3.7 kg)
- Output
- 1.4 kW
- Rotation
- Clockwise (CW)
- Starter Type
- PMGR (Permanent Magnet Gear Reduction)
- Number of Teeth
- 9
- Gear OD
- 0.996 inches (25.3 mm)
- Mounting
- M12×1.75 threaded mounting ear holes
- Warranty
- Varies by manufacturer: 1-2 years typical
What’s in the Box
- 1 x Starter Motor (873549)
Installation Notes
- Disconnect the vessel's battery (negative terminal first) to prevent electrical shorts.
- Locate the old starter motor and label the electrical cables before disconnecting them.
- Carefully remove the mounting bolts securing the starter and take out the old unit.
- Visually compare the new starter with your old one to confirm the mounting points and gear alignment match.
- Position the new starter and securely tighten the mounting bolts to the manufacturer's specified torque.
- Clean the cable terminals and reconnect the electrical wiring to the correct posts on the new starter.
- Reconnect the battery (positive terminal first) and test the new starter by starting the engine.
Troubleshooting & FAQ
How can I confirm this starter motor fits my specific engine?
First, check your original part for any of the part numbers listed in our Part Number Matrix. Second, find your engine model and year in the Engine & Model Compatibility table. If both match, the part is compatible.
What are the common signs of a failing starter motor?
Symptoms include a slow or sluggish engine crank, a single loud click or multiple rapid clicks when turning the key, or the engine not cranking at all. Grinding noises can also indicate a problem with the starter gear.
Is this starter a gear reduction (PMGR) model?
Yes, this is a Permanent Magnet Gear Reduction (PMGR) starter. These starters are typically smaller, lighter, and more efficient, providing higher torque for reliable starting compared to older, larger direct-drive starters.
Does this aftermarket part perform differently from the OEM version?
This aftermarket starter is built to meet or exceed OEM specifications for fit, form, and function. It is designed to provide comparable starting power, durability, and service life under normal marine operating conditions.
What is the difference between OEM and aftermarket parts?
This listing is an aftermarket replacement (not Original Equipment Manufacturer). It has been engineered to OEM-level specifications with comparable materials. All parts are manufactured in an ISO 9002 certified facility and are batch-inspected for quality and consistency.
What are your shipping speeds and costs?
We ship worldwide quickly—typical transit is 5–15 days for most locations. Standard shipping is free, with expedited options available at checkout where applicable.
What warranty and return policies apply?
This part is covered by a 1-year warranty against manufacturing defects under normal use. Should an issue arise, contact our support team with your order details. Returns are accepted within our standard window for unused parts in their original condition. Please see our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against 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, typically arriving in 5–15 days.
- Manufacturer-Direct Value — Fair pricing on reliable, quality-controlled components without compromising on materials.
Payment & Security
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