Are you looking for a new spark plug for your Predator generator but have no idea how to choose one? I have great news for you! Our team here at Generatorist has helped over 600,000 visitors find information about generators and we will help you as well.
Data for this page is based on official manuals from Harbor Freight. We will show you the type of spark plug for specific models of Predator generators, the gap size, alternatives, cross reference charts and links to manuals. We also provide references where you can verify this info for yourself.
Just click on your model to see the specifications and have a 5/8″ (16mm) or 13/16″ (21mm) socket & ratchet at hand.
Predator Generators
Spark plug (info from the Owner’s Manual)
- Type – A5RTC (Torch) or equivalent
- Gap – 0.024″– 0.028″ (0.6-0.7 mm)
- Socket size – 5/8″ (16mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/A5RTC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – E6RTC (LG)
- Gap – 0.028″−0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/E6RTC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – A5RTC (Torch) or equivalent
- Gap – 0.023″– 0.027″ (0.6-0.7 mm)
- Socket size – 5/8″ (16mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/A5RTC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F7RTC (Torch) or equivalent
- Upgrade – BPR6EIX – NGK Iridium Spark Plug
- Gap – 0.027″– 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
DIY Video – https://www.youtube.com/watch?v=nNtWTGmd6qI
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F7RTC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F6TC (Torch) or equivalent
- Gap – 0.027″– 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F6TC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F6TC (Torch) or equivalent
- Gap – 0.027″– 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F6TC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F6RTC (Torch) or equivalent
- Gap – 0.028″ – 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F6RTC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F6RTC (Torch) or equivalent
- Gap – 0.028″ – 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F6RTC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F6TC (Torch) or equivalent
- Gap – 0.028″– 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F6TC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F6TC (Torch) or equivalent
- Gap – 0.028″ – 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F6TC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F6RTC (Torch) or equivalent
- Gap – 0.028″ – 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F6RTC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – F6TC (Torch)
- Gap – 0.028″ – 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/torch/F6TC
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Spark plug (info from the Owner’s Manual)
- Type – BPR6ES (NGK) or equivalent
- Upgrade – BPR6EIX – NGK Iridium Spark Plug
- Gap – 0.028″– 0.031″ (0.7-0.8 mm)
- Socket size – 13/16″ (21mm)
Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR6ES
Owner´s manual – https://manuals.harborfreight.com
Official product page – https://www.harborfreight.com
Is your generator missing from the list?
Feel free to check out the Harbor Freight website in case you didn’t find your generator on this list.
Symptoms of a Bad Spark Plug
Are you thinking about replacing your current spark plug? There are some universal signs you need to look for:
- Your generator won’t start at all
- The generator needs repeated attempts to start properly
- The generator misfires
- Fuel consumption is noticeably increased
- There are deposits and a buildup of residue on your spark plug
- The spark plug is damaged
Are there any deposits? You need to remove the spark plug with a proper tool, clean it using a small knife and make sure that it is gapped properly. You can find the ideal gap size in the list above. For more tips and symptoms of a bad spark plug, read this article on the RepairClinic.com website.
Further resources:
- Choosing the Best Spark Plug for Your Generator
- Predator Generators Oil Type & Capacity Guide
- Predator Generators Fuel Type, Capacity & Run Time Guide
- How to Change Spark Plug on Your Generator
- Choosing the Best Oil for Your Generator
- How to Store Your Portable Generator
- How to Easily Tune Up Your Generator
- Honda Generators Spark Plug Gap & Socket Size Guide
- Honda Engines Spark Plug Gap & Socket Size Guide
- Predator 3500 Generator Oil Type, Capacity & Change Interval Guide
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Matthew Gerther
Founder, Generator enthusiast
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1 thought on “Predator Generators Spark Plug Gap & Socket Size Guide”
I have a predator generator 1,600-2,000 it belongs to a friend and he said that it gets compreshion. And gets spark in not to sure if it gets gas but their is gas and oil in it