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1698-1231 Ignition Coil For WEICHAI Natural Gas Engine
Your Weichai gas truck misfires? The 1698-1231 Woodward OH6 ignition coil fixes it. This smart coil matches OEM specs and installs in minutes. Fits Weichai WP6, WP7, WP10, WP12 natural gas engines with OH6 system. Also replaces Weichai 612600191988. In stock — ships within 48 hours. Email info@rjtparts.com or WhatsApp us for a quote.
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1698-1231 Ignition Coil for WEICHAI WP10 WP12 OH6 Natural Gas Engine | RJT PARTS
Product Overview
The 1698-1231 ignition coil is a Woodward OH6 smart coil designed for Weichai natural gas engines. It converts low-voltage battery current into the high-voltage spark that ignites the CNG or LNG mixture inside each cylinder. This part fits Weichai WP6, WP7, WP10, and WP12 gas engines running the Woodward OH6 electronic control system.
RJT PARTS supplies the 1698-1231 coil as a direct-fit aftermarket replacement. It matches the original Woodward electrical connector and mounting dimensions, so your technician installs it straight out of the box. Every unit passes bench testing for insulation resistance and spark output before we ship it.
Weichai sells this coil under its own part number 612600191988. Therefore, both numbers refer to the identical physical component. Woodward manufactures the OH6 ignition system for Weichai, and this coil serves as the original equipment unit on many China VI natural gas trucks.
Cross-Reference Part Numbers
| Part Number | Brand / System | Notes |
|---|---|---|
| 1698-1231 | Woodward | Primary OEM number |
| 612600191988 | Weichai | Weichai internal number, same coil |
| 1698-1231-WEI | Woodward / Weichai | Suffix variant, identical |
| 1683-1231 | Woodward | Earlier revision |
| IEC-60200N | Aftermarket | Third-party equivalent |
| DQ-3138 | Aftermarket | Third-party equivalent |
Important: 1698-1231 belongs to the Woodward OH6 system. It does not interchange with the Bosch-system coil 0281005866 (Weichai 612600191524). The two systems use different electrical connectors and control logic. Always confirm your engine uses the OH6 system before ordering.
Compatible Engine Models
| Engine Series | Displacement | Power Range | Common Applications | Fuel | Coils per Engine |
|---|---|---|---|---|---|
| Weichai WP6 | 6.2L | 180–240 HP | Medium trucks, buses | CNG / LNG | 6 |
| Weichai WP7 | 7.5L | 240–300 HP | Medium trucks, coaches | CNG / LNG | 6 |
| Weichai WP10 | 10L | 280–380 HP | Heavy trucks, city buses | CNG / LNG | 6 |
| Weichai WP12 | 12L | 350–460 HP | Heavy trucks, intercity buses | CNG / LNG | 6 |
Common vehicle brands:
- Trucks: SHACMAN, Sinotruk HOWO, Foton, Dongfeng
- Buses: Yutong, King Long, Golden Dragon
Emission standard: China VI / Euro VI equivalent
Diesel WP6, WP7, WP10, and WP12 engines do not use this part. This coil fits spark-ignited natural gas (CNG/LNG) versions with the Woodward OH6 system only.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Name | Smart Ignition Coil (OH6 system) |
| OEM Number | 1698-1231 (Woodward) |
| Weichai Number | 612600191988 |
| Cross References | 1698-1231-WEI, 1683-1231, IEC-60200N, DQ-3138 |
| Engine Make | Weichai |
| Compatible Models | WP6, WP7, WP10, WP12 (Natural Gas, OH6 system) |
| Ignition System | Woodward OH6 electronic control |
| Input Voltage | 24V DC |
| Output Type | High-voltage spark, smart coil with ECM feedback |
| Mounting | Bolt-on, cylinder head mounted, one per cylinder |
| Connector | Woodward-spec electrical connector |
| Packaging | 6 pieces per box |
| Quantity per Engine | 6 |
| Condition | New, aftermarket |
| Testing | 100% bench tested |
| Warranty | 12 months |
| Lead Time | 1–3 days (stock) |
Key Features
- Woodward OH6 smart technology. Built-in feedback circuit confirms each spark event to the ECM.
- Dual OE number coverage. One SKU replaces both Woodward 1698-1231 and Weichai 612600191988.
- Broad engine fit. Covers Weichai WP6, WP7, WP10, and WP12 natural gas platforms.
- 24V heavy-duty design. Built for the electrical systems of large trucks and buses.
- China VI compliant. Matches the emission system requirements of late-model Weichai gas engines.
Failure Symptoms — When to Replace
- Engine misfire under load or at cruising speed
- Check engine light with misfire codes (P0300–P0306)
- Increased gas consumption (higher CNG/LNG usage)
- Rough idle or hesitation on acceleration
- Loss of power on gradients or with full loads
- ECM reports ignition coil or OH6 system faults
- Visible cracks, carbon tracking, or burn marks on the coil body
Fleet tip: Weichai OH6 gas trucks running long-haul routes put heavy stress on ignition components. Replace all six coils during a major tune-up to avoid repeated breakdowns. RJT PARTS offers discounted 6-coil engine sets.
Installation Notes
- Disconnect the battery before starting work.
- Remove the engine cover and any intake piping blocking the coil pack.
- Unplug the electrical connector from the faulty 1698-1231 coil.
- Remove the hold-down bolt and pull the coil straight off the spark plug.
- Compare the old coil with the new unit to confirm matching dimensions and connector orientation.
- Apply dielectric grease to the inside of the new coil boot before installation.
- Seat the new coil and torque the mounting bolt to Weichai factory specification.
- Reconnect the harness and battery. Clear fault codes and start the engine to verify smooth operation.
Follow Weichai service manual lockout/tagout procedures for natural gas fuel systems before servicing.
Why RJT PARTS
RJT PARTS supplies engine replacement parts to truck fleets, bus operators, and distributors worldwide. We know that downtime costs revenue, so we keep the 1698-1231 coil and its cross-references on the shelf year-round.
- Verified fitment. We cross-check every order against Woodward and Weichai part catalogs.
- One SKU, two numbers. Order this part and it covers both 1698-1231 and 612600191988.
- Fast dispatch. In-stock orders leave our warehouse within 48 hours of payment.
- Flexible quantities. Order one coil for a repair or a full carton for fleet stock.
- Bulk discounts. Tiered pricing at 10, 50, and 100+ pieces.
- Worldwide shipping. DHL, FedEx, air freight, and sea freight to over 100 countries.
- Technical support. Send your engine nameplate or old part number — we confirm the match within 24 hours.
Custom Product Attributes
| Attribute | Value |
|---|---|
| Supplier | RJT PARTS |
| Part Name | Smart Ignition Coil (OH6) |
| OEM No. | 1698-1231 |
| Weichai No. | 612600191988 |
| Cross Ref. | 1698-1231-WEI, 1683-1231, IEC-60200N |
| Engine Brand | Weichai |
| Engine Model | WP6, WP7, WP10, WP12 |
| Ignition System | Woodward OH6 |
| Emission Standard | China VI / Euro VI |
| Vehicle Brands | SHACMAN, Sinotruk HOWO, Foton, Yutong |
| Fuel Type | CNG / LNG (Natural Gas) |
| Voltage | 24V |
| Qty/Engine | 6 pcs |
| Packaging | 6 pcs/box |
| Condition | New Aftermarket |
| Warranty | 12 Months |
| MOQ | 1 pc |
| Shipping | DHL / FedEx / Air / Sea |
| Payment | T/T, PayPal, Western Union, Trade Assurance |
FAQ
Q: Is 1698-1231 the same as 612600191988?
A: Yes. Woodward manufactures this coil for Weichai. 1698-1231 is the Woodward part number, and 612600191988 is the Weichai internal number. Both refer to the identical coil.
Q: Can I use 0281005866 instead of 1698-1231?
A: No. 0281005866 belongs to the Bosch ignition system, while 1698-1231 belongs to the Woodward OH6 system. They have different electrical connectors and control logic. Always match your engine’s ignition system.
Q: What does OH6 mean?
A: OH6 is the Woodward electronic control system used on many Weichai China VI natural gas engines. It controls fuel injection, ignition timing, and emission functions. The 1698-1231 coil is the ignition component for this system.
Q: How many coils does a WP12NG engine need?
A: The WP6, WP7, WP10, and WP12 are all 6-cylinder engines, so they use 6 ignition coils — one per cylinder.
Q: Will this coil fit a SHACMAN CNG truck?
A: Yes. Many SHACMAN Delong natural gas trucks use Weichai WP10 or WP12 engines with the Woodward OH6 system and the 1698-1231 ignition coil. Sinotruk HOWO gas trucks also use this coil.
Q: Does this coil fit diesel engines?
A: No. The 1698-1231 fits natural gas (CNG/LNG) engines only. Diesel engines use compression ignition and do not require ignition coils.
Q: What is the warranty?
A: 12 months from the date of delivery. We replace any coil that fails due to manufacturing defects.
Request a Quote
Need the 1698-1231 ignition coil for a Weichai OH6 natural gas engine? RJT PARTS has it in stock and ready to ship. One SKU covers both Woodward and Weichai part numbers.
Send your part number, quantity, and destination country to info@rjtparts.com, or message us on WhatsApp for an instant quote. We reply within 24 hours.
📧 info@rjtparts.com
💬 WhatsApp: +86 17882454252
