Hey i'm trying to start my 3W 75us..... I can't tell if the ignition is hooked up right or not, and i also don't know which way is ON for the switch. How do you guys normally check to make sure you're got it hooked up right?

also i'm having a hard time getting gas to the carb.... we had the choke closed and the throttle open, but it never started coming till we put our finger over the carb to choke it better. Any tips here?

thanks

Well, if you're not sure your ignition switch position corresponds to the on/off markings on the switch, unplug the ignition from the switch and plug in your volt meter, then you should know at which position the ignition is on.

Often the pump diaphragm on a new engine, or on an engine that hasn't been run for a while, will be a little dry and stiff, and it will take a little extra to draw fuel for choking. Also keep in mind, that most of these carburetors are really made for engines with some kind of pull start, which spins the engine much more than just the flipping of the prop we do, and thereby suck gas much better.

DKjens

Make sure the choke plate is closing all the way. If you're using a servo to close the choke, make sure it is adjusted so that is fully closing.

yeah another friend said to pull out the spark plug and turn the engine and you should see a spark, so i'll try that thanks

Just put your finger on the spark plug and flip the prop. If its on, you will know it.

By a Smart-fly ignition cutoff. It has an LED indicator that tells you it's on.

No it doesn't. It tells you the switch is on.

I have something kinda similar, though I don't use an optical cut-off (I use a choke servo instead). I got this neat switch from Madison Quality Products... it is a SuperRocker (which I've always used) with an LED attached that blinks if the switch is on... keeps me from forgetting to turn it off!!! Kinda cool.

how much? where to buy?

http://www.qualityrcproducts.com/prod_superrocker.html

New 3W engines have a LED that tells you the ignition is switched on.....it's hooked directly to the ignition. But it doesn't tell you the ignition is actually working.

Those rocker switches are pretty nice...Might have to try one some day..

The Smart-Fly, like Sillyness said, will just let you know that the power is on..the thing I like about it though is if you lose rx power it will kill the engine instantly..nice feature..also you cant accidently start the engine unless the rx has power..another nice feature..There is another similar igniton switch that gets good reviews as well..I think its called Rcat but Im not sure...

thanks guys i got it fired up tonight.

Guys do the ignition units get hot? I read in the 3w manual that you are supposed to mount with grommets that make sure the back of the unit gets air.... before i read that i double sided taped it and used two screws to secure it to the inside of the fuse.

Mount it on the grommets or mount it over a hole or it will get hot.

thanks

Hmmm... is it just 3W units that need the back cooled? I have my DA ignition velcro-wrapped onto 1/2"
foam rubber... lots of air over the top, nothing over the back.

yeah?! my friends is like that but i did as I was told... can't hurt right?