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Looking for glow plugs for a K&B.67

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Looking for glow plugs for a K&B.67

Old 03-03-2006, 09:39 PM
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crossflow235
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Default Looking for glow plugs for a K&B.67

I am looking for a decent glow pug for my K&B .67 O/B motor. Everytime I run it it frys /scrambles the coil in the plug. I am running 25% nitro.
Motor still has very high compression, I am using all of the head spacer rings as well. Whe I used to run the K&B plugs it would loosen the center pin after only one run if I didn't have the extra head spacer gaskets.

Motor seems rich so I cant tell why it scrambles the plugs. [:@]

Is there a plug out thre that works with these motors? hate spending 4 to 5 bucks every time I run it. Makes me love the weedwacker boat I am building more and more every day. I have tried high nitro glow plugs racing plugs plugs with idle bars it doesn't matter. I also use the lowest setting I can on the glow plug heater to save it from scrambling them if motor only pops over when starting it.. That has killed them too..


Any ideas

Old 03-03-2006, 10:47 PM
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piper_chuck
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Default RE: Looking for glow plugs for a K&B.67

I don't have that specific engine, but I'm getting better life from McCoy plugs than any others. MC-59 for lower nitro and MC-9 for higher nitro.
Old 03-04-2006, 10:20 PM
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crossflow235
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Default RE: Looking for glow plugs for a K&B.67

Thanks for the help where can you get McCoy Plugs from?

How long have they lasted for you

Never heard of them
Old 03-04-2006, 11:30 PM
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Default RE: Looking for glow plugs for a K&B.67

Rossi sales http://www.rossisales.com and Rocket City Racing http://www.rocketcityracing.com are a couple places. There are lots of others. I had one boat that burned up a K&B 1L every heat. The McCoys lasted at least the entire weekend, or longer. Yes, I'm pushing the engines pretty hard, but not lean.
Old 03-04-2006, 11:49 PM
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Ron Olson
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Default RE: Looking for glow plugs for a K&B.67

I've never had any luck with K&B plugs. Some people swear by them, I swear at them! I've been using McCoy's for years and have had the best luck with them. Check you glow plug ignitor to see if it's heating the plug up too much and frying it. The K&B's seem to have a thinner element which may be giving you fits.
Old 03-05-2006, 06:59 AM
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ob nut
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Default RE: Looking for glow plugs for a K&B.67


ORIGINAL: crossflow235

I am using all of the head spacer rings as well.
Head clearance should be around .015". Could be either too much or too little head clearance. K&B 1L or MC59 will work for the nitro you are using. I'd go up to the MC9 if you went higher. In my 13cc ob, there are MC9's while using 45% nitro.
Old 03-05-2006, 11:00 AM
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crossflow235
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Default RE: Looking for glow plugs for a K&B.67

Thanks guys looks like I will be trying some McCoys.

Interesting to see I'm not the only one who thinks the K&B plugs are junk...

Thanks again

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