ORIGINAL: pe reivers
You should check battery voltage versus ignition requirements. The Vlach EZM ignition goes to low rpm setting on low voltage so the pilot can still bring his plane in. I believe it is 4.2V (check battery, leads, switches) It is the ignition voltage that counts, not the voltage at the battery.
If voltage is OK and steady, look the seller of the engine deep in the eyes and ask the truth about this engine. He may have had this problem before he sold it to you.
The Vlach ignitions are no longer available.
PS
If the engine has the Vlach ignition, it is older than three years
Yes, the engine has the Vlach EZM ignigion.
I know my friend bought the engine about three years ago, but I have no idea how long it had been lying at the dealer, so it could very well be alot older then three years.
The only reason he bought it was to have a bigger plane then me , but he soon realized that after hurting his back just after he´d bought it and only having one and a half leg after an accident several years ago he was unable to get such a large plane out of his house, so unless he´s started the engine in his livingroom I´m sure he had no idea about this.
When I tried the engine yesterday I used a 4,8v pattery pack, but my intention is to use a 7,4v Lipo and a regulator that can be switched between 5 and 6 volts. Any Idea what the correct voltage would be for this ignition?
ORIGINAL: Kema
Then I have to suspect air leak. Check that carb bolts are tight enough and change the hose that runs from carb foot to engine chamber. If that doesn't help I would open the carb and check diaphragms.
Could be... At this moment I´m hoping that "pe reivers" is right about the ignition not getting enough power...
ORIGINAL: soarrich
I realize the MVVS is a strong motor, but 58cc is 58cc, a 24x10 wouldn't be my choice for a break-in prop. I'd try a 22x8 for breaking it in then switch to a 23x8 and go from there.
Yes, it might be a bit large, but it was the only propeller I had at the moment...
Thanks for your replies.
//Johan