Air Filter 186 Diesel Engine



Air Filter at Generator Parts World

This is for a 186 Diesel Engine Air Filter

This is for an oval diesel engine air filter. Most small diesel engines use either a round or oval filter. This oval filter is most commonly found in small diesel engines that fall in the 178 and 186 engine family. The filter has 1 hole for mounting in the center of the filter. It will come with the foam prefilter as shown.

Air filters can be cleaned and do not always have to be changed. However, eventually no matter how much you clean the filter it will lose air flow. If your engine isn’t running correctly checking or replacing the air filter is one of the steps you will want to take

There can be some variations in the air filters in small diesel engine. The most common small diesel engine are in the 170, 178, and 186 engine families. For some equipment the filters can be slightly bigger or smaller. Often these filters fit the filter housing perfectly so diameter is important as well. Check your filter against the measurements below

Shape: Oblong / Oval
Length (Farthest Point to Farthest Point): 5-1/2″
Thickness (Height): 2-3/4″
Connection: 1 Hole in center for threaded stud

This filter will ship from within the US. All orders ship next business day after cleared payment. We offer several different shipping methods with different delivery times and rates. Please review the shipping tab above this text for more information including handling time, shipping options, USPS information, UPS information, and more.

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All parts are universal parts and are not intended to be represented as OEM parts but represented as parts that are direct replacement parts for specific brands and models, including but not limited to generators and other small engine powered equipment. Generator Parts World will offer a 90 replacement warranty of any part purchased from us under our 90 day replacement policy

Additional information

Weight8 oz
Choke Lever

Long Style

Connection Bolt Size

1/4" Diameter

Connection Bolt Spacing

1-11/16" Center to Center

Front Port Hole

3/4" Diameter

Rear Port Hole

15/16" Diameter

Gaskets Included


Fuel Line

1/4" Internal Diameter x 7-1/8" Long

Shipping Info

All orders will ship from one of our locations within the US, most commonly from Missouri. All orders ship next business day after cleared payment. Business days are Monday through Friday with the exception of holidays.

Our 2 Day Express option may use different carriers such as UPS, FedEx, USPS, or Amazon to offer the best delivery time available. The tracking for your order will be uploaded to PayPal and your order details here on our website. If you need your parts as fast as possible explore on of the shipping options detailed below. All estimated delivery dates below are the estimated time it will take to deliver your order once it ships.

Shipping Within the United States

Free Shipping using First Class Mail: 4 to 6 day delivery
USPS Priority Mail Service: 2 to 4 day delivery
USPS Express Service: 1 to 2 day delivery
UPS Ground Service: 1 to 4 day delivery
2 Day Express Service: 1 to 2 day delivery


Shipping Outside the United States

USPS First Class to Canada: Estimated 10 Days

USPS First Class Worldwide: Estimated 14 to 21 Days


In October of 2021 USPS slow mail delivery on First Class Mail and other services. Please be aware of possible delays by all carriers at peak times such as holidays. Below are some links that can be helpful in identifying delivery times to your location, holiday schedules, and possible delays by the 2 most common carriers we use, USPS and UPS.

USPS Service Alerts

USPS Holiday and Event Schedule

UPS Service Alerts

UPS Holiday Schedule

UPS Ground Shipping Time Map

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