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Hi Tom. I am having mag "drop out" problems same as CDARZA and OKent mentioned on the forum. Cruising at 5,200 rpm and loosing about 50 rpms intermittently. Did mag check while flying and first two checks engine showed 50 rpm drop but ran fine on both #1 and #2 mags. On a third mag check, engine quit while on #1 position (which is first switch "click" from "off") setting. Sounds like the same problem as CDARZA and Okent had. Roger Lee indicated he has not seen a module fail during high rpm running. He indicate modules only fail in the start mode. These two guys say their modules failed during mag run up at 3,000 plus rpms. Okent said new "soft start" modules solved his problem. CDARZA didn't say if he solved his problem with new modules. Have you seen modules that fail at high rpms? I have a set of new soft start modules that I can install but hate to do this if not needed. Was going to check on "P" leads and was thinking a bad ignition switch or bad "P" lead wire might be allowing grounding of the #1 module before reading about this high rpm module failure. My CTSW is 2006 with original modules. Have you used Carmo in Netherlands to recondition modules? Thanks.
Dick Harrison ("runtoeat")
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Hi CDARZA. I am having mag "drop out" problems same as you mentioned on the forum. Cruising at 5,200 rpm and loosing about 50 rpms intermittently. Did mag check while flying and first two checks engine ran fine on both #1 and #2 mags. Third mag check engine quit wile on #1 (which is first switch "click" from "off") setting. Sounds like your same problem? Did you end up sending your mags to Carmo in the Netherlands to have them reconditioned? You didn't indicate if you did this and if this solved your "non-working" mag problem. Thanks
Dick Harrison (runtoeat"
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Good day. Yikes, yup that sounds very similar to my problem. I did send both modules to Carmo and received them back within about a week. So far all good however, i've only flown about 6 hours on the overhauled modules as in my country, we have been on lock down since April.
I did notice though that the engine does start slightly better, although not as smooth as i would like. First start is a bit of a violent start. Once warm and restart its all good. As i mentioned in my previous post, the engine quit on the one mag but when i tried it again about a half hour later i couldnt replicate the engine shut down. Thus, i THINK it was the module but cant be 100% sure about that. I asked Carmo for a report if they found any defect but they never responded.... They just said: "Today we have repaired /overhauled your Rotax 912ULS CDI units. They function perfect again and are ready for shipment"
Note I also sent both units even though only 1 'acted up' Just for overhaul and peace of mind in case the other one had issues.
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Thanks for you reply. Good to know Carmo is a reputable company to deal with. My module would act OK and then just shut down intermittently. You did the right thing by having yours rebuilt.
Dick
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This only happened once and i wasnt willing to wait for it to happen again haha. Im close to 1000hrs so i figured it was a good time to get the modules 'overhauled'. I am still considering replacing with completely new ones from Rotax once i get over the price
One note re Carmo.... they 'overhauled' the inside but it was another price to include the wires and the sheath. I didnt realize this until i got the units back and the sheath still looked its old self. I thought this would have been a cheap replacement for them to have included.
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