slartibartfast Posted June 29, 2008 Share Posted June 29, 2008 Since the onset of winter, my Jabiru 2200 powered Cheetah has been unwilling to start on the battery alone. Fair enough I thought - many Jabirus exhibit this behaviour. Some people solve it by using external warmth before starting. I've been solving it by using a jump-pack. Lately it hasn't even been starting on its own battery (Odyssey) after warming up. This morning, it wouldn't start at all. With the jump-pack, it turned over pretty well, but not a single fire. Checked the spark - as weak as the Liberal party. Disconnected the battery and tried just the jump-pack in case the battery was stuffed. It barely turned over. Wondered about starter earth as discussed in Jab forum at Narromine. Tried earthing the starter with a jumper lead. No better. Measured voltage and resistance here and there, found the starter solenoid wasn't right. Not enough voltage getting through, and too much resistance between HT posts when activated. Tried connecting jump-pack directly to the positive on the starter side of the solenoid and the negative to block at starter. Starter turned the engine over really well, but the earth wire between solenoid and battery melted. This seemed to prove that the solenoid had been leaking to earth, to the point where 2 batteries were required to turn the starter, and eventually there wasn't enough spark left to power the ignition as it deteriorated. Went into town to get another solenoid. Only Super Cheap was open, however they had the identical solenoid. What does that tell you about the one Jabiru supply? I bought it as a short term fix, fitted it and a new earth wire. It still didn't start off the battery, but I figure it was flat by now. Used the jump-pack and it fired straight up. Went for a short 2 hour jaunt. Charging system seemed fine. Got back and shut down, then started it off the battery a few times. No problem. The acid test will be the next cold morning, but I'm betting it will be good. So, if you are having trouble starting your Jab, I highly recommend a closer look at your solenoid. This was the standard one supplied by Jabiru, and you can find them at Super Cheap (SupaCheep?). 'Nuff said? I figure a good test is to disconnect your battery and bridge it straight to the starter and the earth at its base. Probably best to disconnect your solenoid first, in case it leaks to earth like mine did. If the battery turns the starter a lot better this way, the solenoid isn't doing its job right. Note: I'm not a LAME, so run it by one first. I had a LAME helping me diagnose, so it wasn't all cowboys and pot shots. Cheers, and let's be careful out there. Ross Link to comment Share on other sites More sharing options...
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