Threaded tip plugs versus solid?

[Klutch]

My 9r doesn't seem to like the threaded tip plugs. I put a few of them in, in a bpr8es and they've fouled. Threaded tip pulled off and got stuck in cap. Put in solid tip bpr9es plugs and no fouling. Before I switched to a different oil I wanted 8 heat range plugs to help with fouling but couldn't get them locally in a solid tip .

Anyone else experience something similar?

 

[hamlin]

I’ve had that in the past, threaded tip plugs that the tip comes loose and gets stuck in the cap. I’ll only run them now if there is NO other option and I’ll tighten the tip with pliers before they get installed. They aren’t that tight out of the box. I’d look more for the solid tip plugs and buy extra for the future.

 

[goforbroke]

Had a few threaded tip plugs give me problems, like you stated, tip comes off and stuck in cap. Only solid tip caps for me now. I am running the 8's. I don't feel a difference from the 9's

 

[DwightUnregistered]

Locktite the tips on

 

[mt.sledder]

One word for threaded tip plugs. GARBAGE

 

[Wintertime]

Be careful when purchasing and check before you pay and leave. I purchased from the dealer and we talked about this. I paid for plugs went home threaded top. After we discussed it. Just an FYI always check your parts.

 

[armey37]

This is what you want. I ordered directly from NGK.

 

[ExcursionPSD]

The NGK 95521 is properly called a SOLID TERMINAL spark plug It is a BPR8ES spark plug.

NGK 7788 is also a SOLID TERMINAL spark plug BPR9ES.

 

[turboless terry]

I always crimped them if I got threaded on accident. Never had trouble.

 

[BeartoothBaron]

I always crimped them if I got threaded on accident. Never had trouble.

I've done that too, running threaded caps on a variety of engines; I'd think red loctite would also work. They are a bit of liability otherwise. That said, I mostly run BR9EYAs now, which have a solid cap. I'm not sure if that's a good option on newer motors (the electrode on the BPR8/9 projects an extra 1/4" or so), but they seem to be harder to fowl and run a bit better. Might be worth a try, but I have no idea if the non-projected tip is a big deal.

 

[zaasman]

I mostly run BR9EYAs now, which have a solid cap. I'm not sure if that's a good option on newer motors (the electrode on the BPR8/9 projects an extra 1/4" or so), but they seem to be harder to fowl and run a bit better.

I've been running BR9EYAs too for a few seasons now in a '22 850. Seems to run a bit better, and haven't fouled one yet vs the BPR9ES. Haven't tried running BPR8ES that Polaris now specs.

 

[BeartoothBaron]

Yeah, the groove in the electrode makes the EYA harder to fowl, and I like that better than a hotter plug to prevent fowling. A hotter plug is also less likely to fowl, with the downside being a higher risk of pre-ignition (not a reason to avoid Polaris's recommendation - I guarantee they tested extensively). Standard warning on the potential for denial of warranty claims running a plug other than OE spec. That aside, the BR9EYAs work great in the 800s in place of the specified BPR9ES plug, so it's worth a try on anything else that originally came with BPR9ESs. That's if you're fowling plugs; there's no reason to experiment for anyone not having issues.

 

[mt.sledder]

I've had great success with BR9EIX iridium solid top plugs. Expensive but worth it.