Spark Plug for 2010 Arctic Cat CFR 1000 & More - DENSO 4045

Be the first to review this product

$6.99

MPN: 4045

Item Package Quantity: 1

Current Stock:

Quantity:

Adding to cart… The item has been added

Have questions?

Ask an Expert

DENSO Auto Parts Spark Plug P/N:4045

$6.99

Description

Designed for dependable ignition, the DENSO Auto Parts spark plug 4045 pairs DENSO's patented U-Groove ground electrode with a copper-core center electrode in a standard plug. It fits many vehicles, among them the 1978-1981 Honda CR250R, 2005-2006 Ski-Doo GSX 550 Fan and 2005-2006 Ski-Doo GTX 550 Fan. See the Buyer's Guide tab for the full list.

The U-Groove on the ground electrode allows a larger flame front for improved ignitability, which DENSO designed to support better engine efficiency. The copper core in the center electrode gives it superior thermal conductivity, and the plug is OE-grade.

Ground electrode: U-Groove tip design with a nickel core; one ground electrode in a standard configuration
Center electrode: copper core with a nickel tip
Thread and seat: 14.0 mm thread diameter, 19.0 mm reach, flat seat and 20.6 mm hex
Heat range and gap: DENSO heat range 27, pre-gapped to 0.8 mm
Resistance: 5,000 ohms

Quantity per application varies. Some listed applications use one plug and others use two. A worn or fouled spark plug can be one cause of hard starting, misfires or rough running. If the plug is the cause, this replaces it. Country of origin: China.

Manufacturer's Description

Product Specs

Buyer's Guide

Interchange Part Numbers

This part cross-references / interchanges with the following part numbers:

W27ESR-U

Frequently Asked Questions

What does the U-Groove on this DENSO spark plug do?

The U-Groove on the ground electrode allows a larger flame front for improved ignitability. DENSO designed it to support better engine efficiency.

Is this the right CR250R spark plug for my 1978-1981 Honda CR250R?

Yes. DENSO 4045 is listed for the 1978-1981 Honda CR250R, which uses one plug. Other listed model years are shown in the Buyer's Guide tab.

Does it fit the 2005-2006 Ski-Doo GSX 550 Fan?

Yes. It is listed for the 2005-2006 Ski-Doo GSX 550 Fan and the 2005-2006 Ski-Doo GTX 550 Fan, and each uses two plugs.

What are the specs of DENSO 4045?

It has a 14.0 mm thread, 19.0 mm reach, flat seat and 20.6 mm hex. It is DENSO heat range 27, pre-gapped to 0.8 mm, with 5,000 ohms resistance.

What are signs a spark plug may need replacing?

Signs include hard starting, misfires, rough running, or electrodes that look worn or fouled. Other ignition or fuel faults can cause the same symptoms, so diagnose the cause first.