Why do I have to keep replacing my spark plugs?

[hevnsnt1]

I've had this problem a couple of times this past summer. I will go riding for a while, come back, take a break, go to go back out & ski won't start. It will turn over, but won't start. I took the plugs out & plugs looked fine, put a new set in, starts right up. Go riding a while, come back, take a break, go to go again, ski won't start, replaced plugs again, ski starts right up. Plugs aren't fouling, so what's the problem?

 

[Mark44]

XFT Lou had the same problem so LPW sold him a complete total loss system and he never had the issue again.

PM XFT-Lou

Mark44

 

[hevnsnt1]

Was kinda hoping for a less costly solution. I never had this problem until this past summer & my set-up hasn't changed in years.

 

[Mark44]

I think there should be one.

Mark44

 

[Odd Duck]

Try gapping your plugs if you haven't already. Gap should be around 25 or so to "help out" a less than stellar electrical system. You probably still need to do some trouble shooting - may have some bleed off somewhere - gurus where are you? But gapping the plugs can be surprisingly effective. Sometimes the out of the box gap can be ridiculous - 35 or more.

 

[D Slicker]

I have been running the same plugs all summer. Sounds silly but take your hood off when its sitting there and see if it starts next time. If you have a gas fume leak it will cause that. It happened to me last year turned out my fuel fill was loose.

 

[AlbanyMotorsports]

try starting it at 1/4 throttle and see if it might be getting flooded when you shut it down.

 

[hevnsnt1]

Thanx for the input. I will try these next time it happens. Anymore ideas?

 

[BruceSki]

cut back your plug wires.

i noticed a difference this year with the stocker plug boots on there when i changed plugs.

then i ripped the stock boots off and they were burnt back pretty far. maybe 3/8 to a 1/2 inch back.

with a fresh set of plugs it would run great, but once the plugs got a little run time on them the ski would start to run crappy again. a set of NGK plug boots worked great for me.

 

[demolition_x]

i had a similar problem. ski would run great then after i would let it sit it wouldn't start.

the problem was the seats of the needles were worn so they were dumping too much fuel in before / while i was starting the motor to go back out.

they are only like 20 bucks a needle which isn't that bad. and pretty easy to check if you take the carb off

 

[Captain PegLeg]

I had the problem with my kawi, and some old 2 stroke dirtbikes. Sounds like top end time. I replaced to piston and rings on my kawi when this happened, i tried everything... then finally rebuilt it and no more prob, fires right up everytime!

 

[WFO Speedracer]

Ohm out your spark plug boots and see what the resistance is,I have run across many bad Yamaha factory spark plug boots over the past few years,the solution was to replace them with NGK boots,of course cut back the wires slightly if you do this also.

 

[XFT LOU]

What mark 44 said did solve the problem, tl system. But before that Paul at lpw fixed it with a stock coil off a 760. Funny story Paul sent it express to the "Wave Rave '07" camp ground. I installed it just in time but for this year LPW wired up a tl.

 

[jondotcom]

Why not run some irdium plugs? Nice fine tip = easy low resistance spark. By the way, DON'T try to gap an irdium!

 

[#ZERO]

Why not run some irdium plugs? Nice fine tip = easy low resistance spark. By the way, DON'T try to gap an irdium!

Iridium spark plugs have a tiny tip that's welded on which can easily break off during gapping or excessive vibration from a 2-stroke engine.

Use the NGK B8EG-SOLID or BR8EG-SOLID spark plugs which were specifically designed for the 2-stroke engine. They're made for racing and have a deep seated copper core with a wider heat range which is more resistant to fouling. Also they have the fine-wire center electrode which provides better sparking and enhanced ignitability.

It sounds like your plugs could be fuel soaked and shorting out; possible signs of a weak ignition circuit. Try changing your spark plug ends, if they're stock.

 

[Fro Diesel]

Iridium spark plugs have a tiny tip that's welded on which can easily break off during gapping or excessive vibration from a 2-stroke engine.

Use the NGK B8EG-SOLID or BR8EG-SOLID spark plugs which were specifically designed for the 2-stroke engine. They're made for racing and have a deep seated copper core with a wider heat range which is more resistant to fouling. Also they have the fine-wire center electrode which provides better sparking and enhanced ignitability.

It sounds like your plugs could be fuel soaked and shorting out; possible signs of a weak ignition circuit. Try changing your spark plug ends, if they're stock.

Where does one acquire such a plug as this?

 

[#ZERO]

http://www.clubplug.net

http://www.chitownparts.com

http://www.powersportequipment.com