S2K Commerce - Products Dropdown
Actions
S2K Commerce - Order Entry
Actions
Outboard Motor Parts | OEM & Aftermarket
Shop OEM and aftermarket outboard motor parts for Mercury, Yamaha, Suzuki, Honda, Johnson / Evinrude / E-TEC, Tohatsu / Nissan, and Chrysler / Force engines. Pro Marine USA carries parts for routine maintenance, troubleshooting, repair, and complete marine engine rebuilds.
Browse by outboard manufacturer or engine system, or use our OEM parts lookup to identify the correct part number before ordering. Find cooling, fuel, ignition, electrical, internal engine, lower unit, steering, trim, service kit, gasket, seal, and rebuild parts in one place.
Shop Outboard Parts by Manufacturer
Chrysler / Force Outboard Parts for Chrysler and Force outboard repair 
Honda Outboard Honda cooling, fuel, electrical, and engine parts 
Johnson / Evinrude / E-TEC Outboard Johnson, Evinrude, E-TEC, and OMC replacement parts 
Mercury Outboard Mercury and Mariner maintenance, repair, and rebuild parts 
Suzuki Outboard Suzuki service, lower unit, fuel, and engine parts 
Tohatsu / Nissan Outboard Tohatsu and Nissan outboard replacement parts 
Yamaha Outboard Yamaha maintenance, repair, lower unit, and rebuild parts Find the Correct Outboard Part
Not sure which part fits your engine? Start with the engine manufacturer, horsepower, model number, serial number, and year whenever available.
Our OEM parts lookup lets you view factory parts diagrams and identify the original part number for many popular outboard engines. Once you have the OEM number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Shop Outboard Parts by Engine System
Outboard engines use several interconnected systems. Select your manufacturer above to browse the exact categories available for your engine, including the following common repair and maintenance areas.
Common Outboard Problems and Where to Start
- Engine overheating: inspect the water pump, impeller, thermostat, pressure-control components, cooling passages, and engine anodes.
- Hard starting or rough idle: check fuel delivery, carburetor or injector operation, spark plugs, ignition components, filters, and intake sealing.
- Weak spark or no spark: test ignition coils, stators, switch boxes or ignition modules, sensors, wiring, grounds, and related electrical components.
- Low compression or poor power: inspect pistons, rings, cylinder condition, head and powerhead gaskets, bearings, and other internal engine components.
- Milky gear lube: inspect prop shaft, driveshaft, shift shaft, bearing carrier, and other lower unit seals for water intrusion.
- Lower unit or gearcase noise: inspect bearings, gears, clutch components, shafts, and gear lube condition before continued operation.
- Trim or steering problems: inspect hydraulic fluid level, seals, hoses, trim motors, pumps, steering cylinders, and mechanical connections.
Why Buy Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for major outboard engine brands.
- Marine engine parts for routine maintenance, professional repair, and complete rebuild projects.
- OEM diagram and part-number lookup tools to help identify the correct component before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large selection of service kits, engine parts, lower unit components, fuel system parts, electrical parts, steering, and rigging products.
- Same-day weekday shipping available on qualifying in-stock orders placed before the shipping cutoff.
OEM and Aftermarket Outboard Parts
OEM parts are supplied by the original engine manufacturer and are designed for the specific engine application. Aftermarket parts are replacement components produced by independent marine parts manufacturers and may provide additional availability or value for many common repairs.
Pro Marine carries both genuine OEM parts and quality aftermarket replacement parts for many outboard maintenance, repair, and rebuild applications. Always confirm fitment using the engine model, serial number, horsepower, year range, or OEM part number when available.
Frequently Asked Questions
How do I find the correct parts for my outboard motor?
Start by identifying the engine manufacturer, horsepower, model number, serial number, and year. Select the manufacturer above to browse by engine system, or use the OEM parts lookup to locate the original part number from a factory diagram.
Can I search Pro Marine by OEM part number?
Yes. If you already have the OEM part number, enter it into the Pro Marine site search to locate available OEM and aftermarket replacement options. If you do not know the part number, use the OEM parts lookup first.
What information should I have before ordering an outboard part?
Have the engine manufacturer, horsepower, model number, serial number, and year whenever possible. An OEM part number from the original component or parts diagram is especially helpful because visually similar parts may fit different engine families.
What is the difference between OEM and aftermarket outboard parts?
OEM parts come from the original engine manufacturer. Aftermarket parts are replacement components manufactured by other marine parts companies for compatible applications. Pro Marine carries both OEM and aftermarket options across many common outboard engine systems.
Are aftermarket outboard motor parts reliable?
Quality aftermarket marine parts are commonly used for maintenance, professional repair, and engine rebuilding. The best option depends on the application, manufacturer, availability, and customer preference.
Do you carry parts for older outboard motors?
Yes. Pro Marine carries parts for many older Mercury, Mariner, Johnson, Evinrude, Chrysler, Force, Yamaha, Honda, Suzuki, Nissan, and Tohatsu outboards. Availability varies by engine family and component.
What outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump impellers, complete water pump kits, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Outboard parts can vary by model, serial range, horsepower, and production year. Confirm the OEM part number or engine identification information whenever possible before ordering.
840805T1
93315-425W2-00
826364T
44345T3
443453
9760A8
9760T23
43040T1
822779A12
822779A13
822779A14
822779A2
827509A12
827509A6
OEM Mercury CDI Ignition Module
Mercury 8HP-15HP FourStroke CDI Unit 835401T1
This genuine OEM Mercury CDI ignition module is used on select Mercury 8HP, 9.9HP, 13.5HP, and 15HP 4-stroke outboards.
The CDI unit controls ignition timing and spark output for compatible carbureted Mercury small FourStroke engines. It replaces Mercury OEM numbers 835401, 8354011, and 835401T1.
Compatible Applications
| Engine Model | Engine Type | Serial Range | Application Notes |
|---|---|---|---|
| Mercury 8HP | 4-Stroke Carbureted | 0P086824 THRU 0P400999 | Bodensee / international applications |
| Mercury 9.9HP | 4-Stroke Carbureted 323cc | 0G760300 THRU 1B226999 | Select 9.9HP FourStroke models |
| Mercury 9.9HP | 4-Stroke Carbureted 323cc | 0P075166 THRU 0P400999 | Select 9.9HP FourStroke models |
| Mercury 13.5HP | 4-Stroke Carbureted | 0P134638 THRU 0P400999 | International applications |
| Mercury 13.5HP | 4-Stroke Carbureted | 0P401000 & Up | International applications |
| Mercury 15HP | 4-Stroke Carbureted 2-Cylinder | 0G760300 THRU 1B226999 | Select 15HP FourStroke models |
| Mercury 15HP | 4-Stroke Carbureted 2-Cylinder | 0P075166 THRU 0P400999 | Select 15HP FourStroke models |
| Mercury 15HP | 4-Stroke Carbureted 2-Cylinder | 1B227000 THRU 1B727495 | Select 15HP FourStroke models |
| Mercury 15HP | 4-Stroke Carbureted 2-Cylinder | 0P401000 & Up | Select 15HP FourStroke models |
OEM Part Numbers & Supersessions
| Type | Part Number |
|---|---|
| Current Mercury OEM Number | 835401T1 |
| Mercury Cross Reference | 835401 |
| Superseded Mercury OEM Number | 8354011 |
What This CDI Ignition Module is Used For
This Mercury CDI ignition module is part of the outboard ignition system. It helps control spark timing and ignition output so the engine can start, idle, accelerate, and run properly.
A failing CDI module may cause weak spark, intermittent spark, hard starting, misfiring, poor running, or no-start conditions.
CDI modules are commonly replaced during ignition troubleshooting after confirming related components such as spark plugs, ignition coils, kill switch wiring, stator output, and grounds are operating properly.
Using the correct OEM Mercury module helps maintain the proper ignition characteristics for compatible small Mercury FourStroke outboards.
Key Features and Benefits
- Genuine OEM Mercury CDI ignition module
- Fits select Mercury 8HP, 9.9HP, 13.5HP, and 15HP 4-stroke outboards
- Designed for compatible carbureted 2-cylinder Mercury FourStroke engines
- Controls ignition spark output and timing
- Direct replacement for Mercury 835401T1
- Replaces Mercury 835401 and superseded 8354011
- Common replacement during ignition system troubleshooting
- OEM Mercury fit and electrical compatibility
CDI Ignition Module Details
- Brand: Mercury Marine
- Part Type: CDI Ignition Module / CDI Unit
- Current OEM Number: 835401T1
- Cross Reference Numbers: 835401, 8354011
- Application: Mercury 8HP-15HP 4-Stroke Outboards
- System: Electrical / Ignition System
- Engine Type: Carbureted FourStroke
- Approximate Model Years: 1995-2006 models where applicable
FAQ
What engines does this CDI module fit?
This module fits select Mercury 8HP, 9.9HP, 13.5HP, and 15HP carbureted 4-stroke outboards depending on serial number range.
Is this an OEM Mercury part?
Yes. This is listed as an OEM Mercury CDI ignition module with manufacturer item number 835401T1.
Does this replace Mercury 8354011?
Yes. Mercury part number 8354011 has been superseded to 835401T1.
What are symptoms of a bad CDI module?
Common symptoms may include no spark, weak or intermittent spark, hard starting, misfiring, poor running, or no-start conditions.
Should I verify my serial number before ordering?
Yes. Mercury used different ignition components across similar horsepower models, so the engine serial number should always be checked before ordering electrical parts.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Electrical parts should be installed only after diagnosis confirms the correct failure point.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
835401T1, 835401, 8354011, Mercury CDI ignition module, Mercury CDI unit, Mercury ignition control module, Mercury 8HP CDI module, Mercury 9.9HP CDI module, Mercury 13.5HP CDI module, Mercury 15HP CDI module, Mercury 4 stroke CDI, Mercury 323cc CDI, Mercury 15HP carb CDI, Mercury electrical ignition module, Mercury FourStroke no spark, Mercury outboard ignition parts
835401T1
8354011
