ONAN 1863140 BELT TENSIONER Original ONAN/CUMMINS OEM part
ONAN
- Payment Methods
-
- SKU:
- ONAN 186-3140
- MPN:
- 186-3140
- Condition:
- New
- Shipping:
- View Shipping Rates

Available Inventory
Get what you need quickly with our wide stock and fast shipping.
Competitive Pricing
Enjoy competitive rates and great deals on every order.
Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Engineered for lasting precision tension to optimize your generator's belt alignment.
- Maximizes engine efficiency and smooth operation by maintaining correct belt pressure.
- 100% genuine OEM ONAN component guaranteed for seamless compatibility and reliability.
ONAN 186-3140 BELT TENSIONER – Empower Your Power with ONAN's Legacy of Excellence
The ONAN 186-3140 BELT TENSIONER plays a critical role in preserving engine health and extending equipment life. Crafted to meet exacting OEM standards, this component ensures your generator runs silently and efficiently under any load. Secure yours today and safeguard the performance you depend on most for years to come.
Feature that inspires confidence and reliability
- Precision spring mechanism maintaining optimal tension for consistent belt performance.
- Timely replacement prevents engine strain and costly downtime.
- Invest in authentic ONAN parts—order now to sustain uninterrupted power supply.
Details
Product SKU: ONAN 186-3140
We are committed to supporting you with expert guidance to select the right replacement part. Reach out through our help center for tailored assistance. It’s our sincere hope you enjoy a smooth repair experience and regain reliable power quickly with this superior ONAN part.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov