Difficulty Finding Compatible NGK Spark Plugs for Generator

[theprimitive]

I bought a small Pulsar generator and it came with a Torch A7RTC spark plug. I keep seeing people say it's important to swap these for NGKs. The recommended NGK replacement seems to be CR7HSA, but it has the threaded terminal instead of the solid terminal the Torch has. Should I use a screw-on terminal nut to make it work or is that not advisable? Like this: https://www.amazon.com/Tupo-Spark-Plug-Terminal-Nut/dp/B0CL4W9X4R

 

[Lawnman23]

Your Torch plug most likely has a threaded terminal. Try to unscrew the terminal cap to verify. If so, you can just use that cap on the NGK plug.

 

[maraakate]

You can use the terminal caps you linked to.

 

[97prizm]

I bought a small Pulsar generator and it came with a Torch A7RTC spark plug. I keep seeing people say it's important to swap these for NGKs. The recommended NGK replacement seems to be CR7HSA, but it has the threaded terminal instead of the solid terminal the Torch has. Should I use a screw-on terminal nut to make it work or is that not advisable? Like this: https://www.amazon.com/Tupo-Spark-Plug-Terminal-Nut/dp/B0CL4W9X4R

I've had great results with an E3 plug in both my trimmer and mower. I ran some tests with the same amount of fuel and had longer run time with the E3 plug. The project farm guy also tried out E3 and had similar results to mine.

 

[slacktide_bitog]

The Torch does seem to have a removable nut. If NGK doesn't include a new nut, you can use the one from your Torch.

Also, NGK makes an iridium version CR7HIX. There is also Denso IUF22

 

[JavierH19]

Is this NGK not the same one? Looks like it.

https://www.oreillyauto.com/detail/...c38GK6XkNOLHxdLjIW74idDMcGHEqaWeAiBxGDKlh4RLb

 

[OneLonelyBurrito]

I went through something similar earlier this year with my generator. I think I ended up using the NGK CR5HSB. I think I found it at Advance Auto. Cause I know I bought the CR5HSA but it had the threaded end, so I returned it for one without the threaded end cause the torch didn't have a removable cap

 

[JavierH19]

Found a bunch more. I left brand and gap unselected but you can select NGK only and see only those. There's some good denso iridiums and NGk iridium Ix which would fire stronger than a basic plug. I don't know what heat range that torch plug crosses to on others but i don't think there's much variance in this application it's meant for.

https://www.sparkplugs.com/search/r...=true&pagenumber=3&specs=165308,165312,165339

 

[theprimitive]

The Torch does seem to have a removable nut. If NGK doesn't include a new nut, you can use the one from your Torch.

Also, NGK makes an iridium version CR7HIX. There is also Denso IUF22

Thanks for the reply. Is iridium preferable? Any reason to use Denso over NGK? Looks like I can get the NGKs from Advance Auto today.

How hard do I have to torque the cap to get it off? It doesn't seem to be coming off easily--I don't want to damage the only confirmed good plug I have at the moment. Thinking I should get the pack from Amazon. Thanks.

 

[theprimitive]

Is this NGK not the same one? Looks like it.

https://www.oreillyauto.com/detail/...c38GK6XkNOLHxdLjIW74idDMcGHEqaWeAiBxGDKlh4RLb

Yes, CR7HSA is the recommended replacement for Torch A7RTC in the NGK chart, but the terminal is threaded. I need the solid terminal or the screw-on nut if that's acceptable--seems like the consensus is that it is.

 

[theprimitive]

I went through something similar earlier this year with my generator. I think I ended up using the NGK CR5HSB. I think I found it at Advance Auto. Cause I know I bought the CR5HSA but it had the threaded end, so I returned it for one without the threaded end cause the torch didn't have a removable cap

I actually have two of those I bought for a Predator 2000W that I ended up swapping out for the Pulsar (was a better deal and included dual fuel), but the heat rating is different, so I can't use them on the Pulsar.

 

[theprimitive]

Found a bunch more. I left brand and gap unselected but you can select NGK only and see only those. There's some good denso iridiums and NGk iridium Ix which would fire stronger than a basic plug. I don't know what heat range that torch plug crosses to on others but i don't think there's much variance in this application it's meant for.

https://www.sparkplugs.com/search/r...=true&pagenumber=3&specs=165308,165312,165339

Thanks! Didn't know about that tool. Heat range is 7 for Torch and NGK, looks like it's 22 for Denso. If the heat range doesn't matter I could just use my CR5HSB's, but that seems risky.

I guess the different specs on the iridium electrodes don't matter? They're slightly different from CR7HSA (recommended nickel version).

 

[slacktide_bitog]

Thanks for the reply. Is iridium preferable? Any reason to use Denso over NGK? Looks like I can get the NGKs from Advance Auto today.

How hard do I have to torque the cap to get it off? It doesn't seem to be coming off easily--I don't want to damage the only confirmed good plug I have at the moment. Thinking I should get the pack from Amazon. Thanks.

Iridium will last much longer and also be easier to start since the thinner electrode requires less voltage. You might also use less fuel.

You can buy the terminal nut separately if you can't get the old nut off. AAP or any parts store should have it, and if not, Amazon.

Denso and NGK both make good spark plugs, so no reason to use one or the other, except maybe price/availability.

 

[JavierH19]

Thanks! Didn't know about that tool. Heat range is 7 for Torch and NGK, looks like it's 22 for Denso. If the heat range doesn't matter I could just use my CR5HSB's, but that seems risky.

I guess the different specs on the iridium electrodes don't matter? They're slightly different from CR7HSA (recommended nickel version).

Does the torch plug that comes with it have the removable tip like pictured here. Try to unscrew it without damaging it. If it does have a removable terminal nut then you can use more options. Didn't know it needed to be solid but you can select solid in the website.

The electrode spec can change a bit since heat dissipation changes but it's not a problem. Heat range can be a notch higher or lower in these lower compression engines without it mattering even going up or down two won't really matter either. In modern car engines it matters far more especially if turbocharged or with an aggressive timing map but in regular car engines going up or down 1 heat range notch virtually never causes issues. It's better to go one down than one up though.

For the most part if the plug is a tad hotter you nick the timing back a tad but most put a hotter plug in with or without knowing and nothing happens. Generators run for longer than in other applications so a touch colder plug wouldn't be bad since it'll take longer to get hot but in generator use it'll stay hot enough to burn deposits. What heat range do those pulstars have? They will likely work fine.

 

[theprimitive]

Does the torch plug that comes with it have the removable tip like pictured here. Try to unscrew it without damaging it. If it does have a removable terminal nut then you can use more options. Didn't know it needed to be solid but you can select solid in the website.

The electrode spec can change a bit since heat dissipation changes but it's not a problem. Heat range can be a notch higher or lower in these lower compression engines without it mattering even going up or down two won't really matter either. In modern car engines it matters far more especially if turbocharged or with an aggressive timing map but in regular car engines going up or down 1 heat range notch virtually never causes issues. It's better to go one down than one up though.

For the most part if the plug is a tad hotter you nick the timing back a tad but most put a hotter plug in with or without and nothing happens and generators run for longer so a touch colder plug wouldn't be bad since it'll take longer to get hot but in generator use it'll stay hot enough to burn deposits. What heat range do those pulstars have? They will likely work fine.

View attachment 310621

I tried to remove the tip on the Torch with smooth pliers, but no go. I think I'll just leave it on there and buy some nuts.

The heat number for the Torch plug that came in the Pulsar is 7 which maps to NGK# 7. I have some NGK CR5HSB's already, but I think I'll get the NGK iridiums with the correct heat rating and buy the terminal caps for them. Thanks for the tips.

 

[theprimitive]

Iridium will last much longer and also be easier to start since the thinner electrode requires less voltage. You might also use less fuel.

You can buy the terminal nut separately if you can't get the old nut off. AAP or any parts store should have it, and if not, Amazon.

Denso and NGK both make good spark plugs, so no reason to use one or the other, except maybe price/availability.

Sounds like iridium is the way to go for an extra $5. I don't expect to put a lot of hours on this generator, but better starting could be important. Couldn't get the old nut off easily so I'll just buy some spares. I think I'm gonna order NGK CR7HIX's since they seem to be more available than the Densos. Thanks!

 

[Silverado12]

I've had issues with two NGK small engine plugs and my brother had one fail on a motorcycle. They used to be my go-to spark plug but I switched to Champion and so far they've been good.

 

[theprimitive]

I've had issues with two NGK small engine plugs and my brother had one fail on a motorcycle. They used to be my go-to spark plug but I switched to Champion and so far they've been good.

Thanks for the heads-up. The iridium ones I bought seem to get good reviews, but if anything seems off I'll try swapping the plugs.

 

[Japanese]

Thanks! Didn't know about that tool. Heat range is 7 for Torch and NGK, looks like it's 22 for Denso. If the heat range doesn't matter I could just use my CR5HSB's, but that seems risky.

Different companies have different numbering system for their plugs. Some companies mach one another, but not all.
Denso heat range 22 matches NGK 7 plugs:
https://www.ngk.com/heat-range-conversion-chart-2

Don't use CR5HSB plugs because they are 2 heat ranges hotter. Also don't by spark plugs on eBay (and to some degree Amazon too) because they're often counterfeit. Make sure you buy them directly from the manufacturers or from authorized sellers. I shop a few times from www.sparkplugs.com and I think they sell genuine plugs. But I also bough counterfeit plugs from eBay that didn't last long.

 

[Japanese]

I've had issues with two NGK small engine plugs and my brother had one fail on a motorcycle. They used to be my go-to spark plug but I switched to Champion and so far they've been good.

NGK never failed me once in any machine. If you buy cheap plugs on eBay or Amazon there is a very high chance that your getting counterfeit Chinese plugs.