old spark plugs for yamaha generators

Yamaha Generators Spark Plug Gap & Socket Size Guide

Are you looking for a new spark plug for your Yamaha generator but have no idea how to choose one? I have great news for you! Our team here at Generatorist has helped over 350,000 visitors find information about generators and we will help you as well.

Data for this page is based on official manuals from Yamaha. We will show you the type of spark plug for specific models of Yamaha portable 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.

Yamaha Generators

Spark plug (info from the User’s Manual)

  • TypeCR4HSB (NGK) or equivalent
  • Gap – 0.024″– 0.028″
  • Socket size – 13/16″ (21mm)

Alternativeshttps://www.sparkplug-crossreference.com/convert/NGK_PN/CR4HSB

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • Type – BPR6HS (NGK) or equivalent
  • Gap – 0.024″– 0.028″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR6HS

Owner´s manualhttps://www.yamahamotorsports.com

Spark plug (info from the User’s Manual)

  • Type – BPR6HS (NGK) or equivalent
  • Gap – 0.024″– 0.028″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR6HS

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • Type – BPR6HS (NGK) or equivalent
  • Gap – 0.024″– 0.028″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR6HS

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • TypeBPR4ES (NGK) or equivalent
  • Gap – 0.028″ – 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR4ES

Owner´s manualhttps://library.ymcapps.net

Spark plug (info from the User’s Manual)

  • Type – BPR5ES (NGK) or equivalent
  • Gap – 0.028″– 0.031″
  • Socket size – 13/16″ (21mm)

Alternatives – https://www.sparkplug-crossreference.com/convert/NGK_PN/BPR5ES

Owner´s manualhttps://library.ymcapps.net

Is your generator missing from the list?

Feel free to check out the Yamaha 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. 

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Founder, Generator enthusiast

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