I check spark plug chainsaw fit by gap and thread. This page helps you match the part to your engine before you buy. Short spark plug chainsaw roundup…
Measure this first
I check spark plug chainsaw fit by gap and thread. This page helps you match the part to your engine before you buy. Short spark plug chainsaw roundup…
Evan's spec pass. Measure the gap in millimeters and count the thread turns. Match those numbers to the product title on the Amazon page.
A spark plug chainsaw fit check is about the gap and the thread, not the brand. If the gap is off, the engine misfires. If the thread is wrong, it will not seat.
Look at the product photo to see the electrode gap and the thread pitch. These two details are the only things that matter for a correct fit.
01 Air Filter Spark Plug Kit Compatible with STIHL MS290 MS310 MS390…
| Kind | spark plug chainsaw |
| Stars | 4.8 |
| Price | $7.99 |
| Page | Open the Amazon listing |
This kit is explicitly labeled for STIHL MS290, MS310, and MS390 chainsaws, so the fit check is specific to those model numbers rather than a generic small engine. Verify your saw's model plate matches one of these three before adding it to your cart.
In the product photo, look for the air filter element shape and the spark plug gap tool included in the kit. If your current filter is a different shape or your plug requires a different gap, this specific STIHL combination will not seat correctly.
$7.99
Price copied from the Amazon listing when this was written. Check the live price.
02 HOBUZA 6 Inch Brushless Mini Chainsaw, Lightweight One-Hand Saw…
| Kind | spark plug chainsaw |
| Stars | 4.6 |
| Price | $37.99 |
| Page | Open the Amazon listing |
The title specifies a 6-inch bar and a brushless motor designed for one-hand pruning, which dictates the physical width and weight you are handling. This is a compact tool, not a full-size logging saw, so the fit is for small branches and light wood.
Check the photo for the chain tensioning mechanism and the battery port. If you need a bar longer than 6 inches or a gas-powered unit for heavy timber, this electric mini-saw is the wrong fit for your workload.
$37.99
Price copied from the Amazon listing when this was written. Check the live price.
03 JET 18" Woodworking Band Saw, 1.75 HP, Safety Foot Brake, 16" Resaw
| Kind | spark plug chainsaw |
| Stars | 5.0 |
| Price | $3244.00 |
| Page | Open the Amazon listing |
This listing is for an 18-inch band saw with a 1.75 HP motor and a 16-inch resaw capacity, which defines the maximum width of material you can cut. The fit here is determined by the size of your lumber and your workshop floor space.
Look at the photo for the foot brake and the guard assembly. If your wood pieces are wider than 16 inches or you need a larger throat depth for resawing, this specific JET model will not accommodate your projects.
$3244.00
Price copied from the Amazon listing when this was written. Check the live price.
04 Champion 4 Pack Small Engine Spark Plug, Stk No. 909, Plug Type #…
| Kind | spark plug chainsaw |
| Stars | 4.9 |
| Price | $18.79 |
| Page | Open the Amazon listing |
The title identifies the plug type as RS17YX, which is a specific heat range and thread size for small engines. You must match this part number to your engine's manual to ensure the fit is correct.
In the photo, verify the thread pitch and the reach of the plug. If your engine requires a different heat range or a longer/shorter reach, this RS17YX plug will not thread in properly or will cause engine issues.
$18.79
Price copied from the Amazon listing when this was written. Check the live price.
05 N2 Two Champion Spark Plugs – CJ7Y
| Kind | spark plug chainsaw |
| Stars | 4.9 |
| Price | $10.99 |
| Page | Open the Amazon listing |
This listing is for two Champion CJ7Y spark plugs, a specific model often used in older or specific small engine applications. The fit is determined by the CJ7Y designation, which dictates the thread size and heat range.
Check the photo for the plug's overall length and the electrode gap. If your engine manual specifies a different plug type, such as a different heat range or thread pitch, this CJ7Y plug is not the correct fit for your machine.
$10.99
Price copied from the Amazon listing when this was written. Check the live price.
06 Briggs & Stratton 491055-2pk Spark Plug (2 Pack) Replaces…
| Kind | spark plug chainsaw |
| Stars | 4.8 |
| Price | $6.19 |
| Page | Open the Amazon listing |
The title states this replaces part numbers 805015, 72347, 491055, and Champion RC12Y, indicating a specific cross-reference for Briggs & Stratton engines. You must match one of these part numbers to your engine's requirements.
Look at the photo for the plug's insulator length and the terminal type. If your engine requires a different plug shape or a different terminal connection, this specific Briggs & Stratton replacement will not fit your engine block.
$6.19
Price copied from the Amazon listing when this was written. Check the live price.
07 Honda 98079-56846 (BPR6ES) Small Engine Spark Plug for GCV160…
| Kind | spark plug chainsaw |
| Stars | 4.8 |
| Price | $5.95 |
| Page | Open the Amazon listing |
This is a Honda-specific plug, part number 98079-56846, also known as BPR6ES, designed for GCV160 and GCV190 engines. The fit is strict to these Honda model numbers and the BPR6ES specification.
In the photo, verify the plug's reach and the heat range marking. If your engine is not a GCV160 or GCV190, or if it requires a different heat range, this Honda-specific plug will not be the correct fit for your small engine.
$5.95
Price copied from the Amazon listing when this was written. Check the live price.
08 Briggs & Stratton 796112S Spark Plug Replaces 4220/8025925/796112
| Kind | spark plug chainsaw |
| Stars | 4.8 |
| Price | $4.50 |
| Page | Open the Amazon listing |
The title lists this as a replacement for part numbers 4220, 8025925, and 796112, which are specific to certain Briggs & Stratton engine configurations. You must match one of these numbers to your engine's manual.
Check the photo for the plug's thread size and the insulator design. If your engine requires a different plug type or a different thread pitch, this specific Briggs & Stratton 796112S plug will not seat correctly in your engine.
$4.50
Price copied from the Amazon listing when this was written. Check the live price.
Ports, speeds, and what the title hid
What do I measure on the old plug?
Measure the gap between the electrodes and count the thread turns per inch.
Which model does this match?
It matches any chainsaw engine that uses the same gap and thread size listed in the title.
What if the fit is wrong?
Return the plug and buy one with the exact gap and thread size for your engine.