821421 Radiator Mounting Insulator Briggs and Stratton Genuine OEM Part
BRIGGS & STRATTON
- Payment Methods
-
- SKU:
- 821421
- UPC:
- 047282107454
- MPN:
- 821421
- Condition:
- New
- Shipping:
- View Shipping Rates

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Description
- Brand trust: This 821421 Radiator Mounting Insulator is an original BRIGGS & STRATTON replacement part, made specifically to meet their stringent manufacturing standards.
- Quality assurance: Crafted to ensure a perfect fit and durability that supports your equipment's longevity, preserving the cooling system effectively.
- Take action: Replace worn or damaged insulators with this genuine OEM part to maintain engine reliability and reduce repair downtime.
821421 Radiator Mounting Insulator - Essential BRIGGS & STRATTON Engine Stability & Cooling Support
The BRIGGS & STRATTON 821421 Radiator Mounting Insulator is designed to secure and cushion the radiator within your engine assembly. This mounting insulator plays a crucial role in stabilizing the radiator, minimizing vibration and movement during operation that could otherwise lead to premature wear or leaks. Installing the BRIGGS & STRATTON 821421 insulator ensures that the radiator remains properly positioned, supporting consistent cooling system performance and protecting surrounding components from stress. Utilizing this genuine OEM part helps maintain your equipment’s designed performance and reliability.
BRIGGS & STRATTON Reliability Starts with OEM Radiator Mounting Insulators
Choosing the BRIGGS & STRATTON 821421 Radiator Mounting Insulator means selecting a component built exactly to the original specifications from the manufacturer. This guarantees precise fitment without the need for modifications, and assures that the material properties and tolerances align perfectly with the engine design. Compared to aftermarket alternatives, this OEM insulator delivers stable, predictable performance and durability that supports long-term engine health.
- Exact fit — engineered to original dimensions and mounting points; no modification or adapting required.
- Original specification — made to the materials and tolerances BRIGGS & STRATTON designed the engine around.
- Dependable performance — predictable service life and behavior, unlike the variability of aftermarket alternatives.
BRIGGS & STRATTON Radiator Mounting Insulators Maintain Cooling Precision and Engine Integrity
This mounting insulator cushions the radiator assembly within the engine compartment, absorbing vibrations and preventing metal-to-metal contact that can cause damage or premature failure. By stabilizing the radiator, it helps maintain optimal coolant flow and heat dissipation. Proper isolation of the radiator also reduces stress on hoses and fittings, contributing to fewer leaks and longer-lasting engine components. Ensuring this part is in good condition is essential for preserving overall cooling system effectiveness.
BRIGGS & STRATTON Radiator Mounting Insulator Replacement - Safe and Correct Service
Before servicing your engine’s radiator mounting insulator, ensure the engine is completely off and cool. Disconnect the spark plug lead to prevent accidental starting. Refer to your engine's service manual for detailed instructions and torque specifications specific to your model. Typically, replacing this insulator involves removing mounting bolts, carefully positioning the new insulator, and securing it without over-tightening. Proper installation preserves the intended vibration isolation and radiator alignment.
If you are unsure about compatibility or installation procedures, reviewing your equipment’s model and serial numbers can help confirm you have the correct BRIGGS & STRATTON 821421 part before purchase.
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