I have a hard time starting my trailblazer if it sits for more than a week or two in cold weather. Both my 500's start right up, even after sitting for a month or two, but the 250, 2 stroke takes forever. Generally, I have to spray wd40 on the spark plug and crank a while after that. The plugs seem to foul pretty quickly, too. Is this a common problem with these? Is there anything I can check to see if things are working properly? Spark and fuel should make fire.

Does anyone have a recommended cold start method that might work better than an other?

Thanks,
SnowDrift

 

You probably need to change your jetting. What temperature(ºF) do you mean? Are you also trying full and half choke?

 

Both of my Polaris's were jetted excessivly rich from the factory, I dropped 1 size down on my Trailblazer and had to drop 2 sizes on my Scrambler to quit fouling plugs and get rid of the rough starting, Its just insurance on there part but a pretty cheap and easy remedy[img]i/expressions/face-icon-small-wink.gif[/img]

 

my 400 2 stroke starts up no hassel everytime, unless the starter freezes, then i have to pull start, still no problem tho

 

I don't know anything about jetting the carb, so I would need some pointers on what to do and what not to do if anyone can volunteer info.

I did get it started on Sunday by spraying a mist of carb cleaner toward the carb. I was able to get it to run long enough to warm it up and then it ran fine on its own. Does this tell a story of needing jetted, as well?

What size of jets, if so and where do I get them? How can I check the ones I have?

 

I just rejetted our TB last night, it's fairly simple.

turn off fuel from gas tank
Take off seat and airbox (maybe back plastic, I allready had it off)
lossen clamp and slide air intake tube off carb - the big black one from airbox
loosen clamp and slide carb out of the big black tube going to engine
carefully tilt carb so you can access bottom
remove the 17mm bolt (cap) from bottom of carb
you will see the main jet in the bottom of carb where you removed 17mm cap.
The jet is brass and looks like a small bolt with a hole in center, just unscrew it with a socket. ( sorry I forget the size )

Mine was was a 130 from factory, sounds like you need smaller but I don't know what sizes they come in. I'm guessing the next size down is 120 but there could be something in between.

 

Sounds more like a choke problem to me. I have a 99 and 00
TB and don't have any trouble starting them in the winter.
The stock main jet is a 130. For air temps below 40 a 140
main is what the book calls for. But check your Owners
manual for the choke adjustment.

 

I sure hope it's a choke problem because rejetting just because of a temp change will stink. In fact, it would be a reason to sell the thing, in my opinion. I want to be able to go get on and ride in any weather without having to disassemble the thing.

I had trouble with this in the summer when I bought it, too. It had been sitting for a few weeks and it would not start, so the guy used ether to get it going. It was about 65-70 degrees that evening. What can I check on the choke?

 

Do you give it gas when you are tring to start it? My kids do that
and they have alot of trouble starting it in cold or warm temps.
I can just go out flip the choke to full on and hit the starter
button for a few seconds. If it doesn't start wright away I try
it again or until it does start. I think the manual says that you
have to have about a 1/8" of cable free play. It should be somewhere
in your owners manual.

 

<< I sure hope it's a choke problem because rejetting just because of a temp change will stink. In fact, it would be a reason to sell the thing, in my opinion. I want to be able to go get on and ride in any weather without having to disassemble the thing.
>>



I've never had to rejet for temp changes, I only rejetted when I put on the RCR stage 1