spikeman

Well I just got a ofna truggy starter box and I plan on using it to start my new ST-1 with the stock engine, but it doesn't want to turn it over. It will if I let the box rev and then push down all the way, but only for a half second and then it stops. I always thought it should be able to keep turning it over like a roto start not just for a split second then have to let the box rev again and push down all the way. I think the problem lies in my batteries. I use two 7.2 volt stick packs, one is 1800 and one is really old and it's 1400. the really old battery goes dead as soon as the box revs and the box actually revs higher when I unplug it so I'm going to order a 12v gel pack. basicly my two main questions are should my box be able to turn the motor over and over like a spin start not just for a half second? and does it sound like my problems will be gone when I get that new 12v gel pack?

azzman

Yes and no...sometimes when an engine is new, depending on how much compression it has it may not turn over very easily, try loosening the glo-plug and see if that helps...also some engines need to be pre-heated during the runin period because the pinch is too tight until it loosens up after a while.
Also make sure the flywheel is lined up really well with the wheel and that the wheel is not rubbing at all on the chassis...and if you can try it out hooked up to a car battery just to see what difference a decent 12v power supply will make. FYI I use a 12 gell cell when Im not near my car, then I hook it up to that.

Good luck.

j_blaze

you may have to adjust the kick point, if its too high it will start too late, if its too early, you may be pushing too hard. i push mine down nice and slow and it turns them over fine, with lots of pinch.

ericem

Probably a weak battery. The 12v gel cell should definitely be able to do the job. Make sure the wheel is not rubbing the chassis.