facthunter Posted July 20, 2017 Posted July 20, 2017 What are the plugs gapped at? Are they "R" plugs (don't use) and are the leads OK? Wire type. not carbon thread. If it's a sharp miss, it's usually electrical. Nev
Geoff_H Posted July 21, 2017 Posted July 21, 2017 Have you checked out the condition of the vibration absorber's in the gearbox?
Callahan Posted July 21, 2017 Author Posted July 21, 2017 All good ideas & I appreciate them all but I have good news.....finally! I rewired all wiring that exits that hole on the case that comes from the stator. Those same wires going to the ignition switch up front were old, had multiple connections & were of various sorts of wire material. I replaced all that with high quality, 14 gauge stranded, cleaned the ground at the switch with a new ground wire, made new connections and.....no more electrical miss! You're probably asking yourselves, "Why didn't this dingbat do that to begin with?" The answer is no excuse but it has been working fine with those wires for 19 years. I just figured it wasn't the wires. Stupid I know but there it is. Now the problem is mid range abnormal vibration. When the needles rise above & lets the main jets have at it, it purrs like a kitten from 5k to full power. When I back down below 5k to mid range, here comes the heavy vibration. I think there is a mismatch in the slides. Next job is to get the two slides to work in harmony & I "think" that will cure my mid range blues! Thank you all very much for your help. That miss was a bitch to cure! I tried everything but the obvious! Lesson learned. Bill Catalina 2
M61A1 Posted July 21, 2017 Posted July 21, 2017 While you're in there, check that both needle are in the correct slots and are straight and have no wear, then make sure that both cable outer ends are properly seated in their respective sockets. Probably wouldn't hurt to have a look at the inner as well. I had to change one recently as it was fraying.
Callahan Posted July 21, 2017 Author Posted July 21, 2017 Will do! Thanks M61. While you're in there, check that both needle are in the correct slots and are straight and have no wear, then make sure that both cable outer ends are properly seated in their respective sockets. Probably wouldn't hurt to have a look at the inner as well. I had to change one recently as it was fraying. While you're in there, check that both needle are in the correct slots and are straight and have no wear, then make sure that both cable outer ends are properly seated in their respective sockets. Probably wouldn't hurt to have a look at the inner as well. I had to change one recently as it was fraying.
farri Posted July 21, 2017 Posted July 21, 2017 Hi Bill, This may help you.....Bing 54 Carburetor Jet chart for Rotax Engines... Bing 54 carburetor jetting, Bing 54 carburetors jet chart for Rotax aircraft engines. Franco.
Callahan Posted July 21, 2017 Author Posted July 21, 2017 Thank You Franco! I think I'm on my way to a vibration free life! I appreciate you guys. Bill Catalina 1
M61A1 Posted July 21, 2017 Posted July 21, 2017 You mentioned a "harmonic balancer before, I use a "Balance Master" on my prop flange, it makes a huge difference. link below: HOME
Callahan Posted July 21, 2017 Author Posted July 21, 2017 M61, I was hoping somebody would answer that. Thanks. I had tried one years ago with no noticeable improvement. However, knowing me, it could've been something I neglected at installation. I'll give it a try. If it works as you say, I'll buy another for my Trike. Thanks again!....and for the link. Bill Catalina You mentioned a "harmonic balancer before, I use a "Balance Master" on my prop flange, it makes a huge difference. link below:HOME
M61A1 Posted July 21, 2017 Posted July 21, 2017 I don't know how you could screw up the installation.....you just bolt it to the flange with your prop. I know it made a big difference to mine through the whole range. I had previously used a a dynamic balancer with good results, but I still had vibes in some of the range. I told a friend ( another maintainer) about them, he was impressed enough to become a distributor for them here.
Callahan Posted July 21, 2017 Author Posted July 21, 2017 I just wrote them for info. I've got a 503 with a 60 inch IVO on my Drifter. Which one did you order if you don't mind my bugging the heck out of you. I found their site to be a little un-explanatory as to ordering. As for screwing something up, I'm a master at it. But the one I bought was at least 30 years ago & it was smaller than their 7 inch version. Thanks! You mentioned a "harmonic balancer before, I use a "Balance Master" on my prop flange, it makes a huge difference. link below:HOME I don't know how you could screw up the installation.....you just bolt it to the flange with your prop.I know it made a big difference to mine through the whole range. I had previously used a a dynamic balancer with good results, but I still had vibes in some of the range. I told a friend ( another maintainer) about them, he was impressed enough to become a distributor for them here.
Callahan Posted July 21, 2017 Author Posted July 21, 2017 Got it! Thanks! This one.OFFSET PROP, Balance Masters
AussieB1rd Posted August 10, 2017 Posted August 10, 2017 Callahan, I'm gunna go out on a limb here, 2 stroke rotax engines are similar to 2 stroke motorcycle engines, with you breaking down and rough running issues I just wonder, Had an old BSA Bantam years ago and had a heaps of issues over a period of time, myself and mechanics couldn't solve it, went for a long ride one day and got so bad I had to stop luckily it was near an old fashioned bike shop, the old guy had me up and running in quick time and just a few bucks, seemed the capacitor in the points was faulty and once fixed ran smooth as, as the Rotax 503 has two capacitors just wondering if that is part of your running smooth issues. Showing my age on th
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