Hi all
Background - the engine working idle very poorly.
The carbs were removed, disassembled and washed (some of the gunk was washed out), but unfortunately this did not help with the idle speed.
While motor is running, I tried to pull out connectors from CDI units, it was found out that there is no reaction on the third (lower) cylinder if the connector is pulled out. That is, the lower cylinder does not work.
I measured the resistance of the charging coil according to the service manual table - it's normal, 710 ohms. I started measuring of resistance of the starting coils (trigger), and there was a surprise - there was megaohms. Well, I thought it couldn't be, so I brought another device to check - it was the same, namely, the resistance between each "signal" out and ground (black wire) was about 5-7 mOhms. Between different coil outs (any) it was infinity.
If you look at the service manual diagram - well, that can't be. Well, hundreds of ohms or kilo-ohms, I suppose there should have been.
But if there's a break - how does it start and work (it works poorly, but it works)???
Also confusing is the intriguing info in the service manual:
"The resistance of the starting coil is not measured. Check the starting coil as suggested in the chapter "Checking the output voltage on the CDI" - "Checking the output of the starting coil"
The question is - is the trigger looks like failed? Then why does the engine start? I wouldn't want to just remove the flywheel for nothing.
Can someone tell me - should I dig in the direction of the starting coil, pull off the flywheel, or look in the other direction based on the symptoms described above?
Thank you in advance!
Background - the engine working idle very poorly.
The carbs were removed, disassembled and washed (some of the gunk was washed out), but unfortunately this did not help with the idle speed.
While motor is running, I tried to pull out connectors from CDI units, it was found out that there is no reaction on the third (lower) cylinder if the connector is pulled out. That is, the lower cylinder does not work.
I measured the resistance of the charging coil according to the service manual table - it's normal, 710 ohms. I started measuring of resistance of the starting coils (trigger), and there was a surprise - there was megaohms. Well, I thought it couldn't be, so I brought another device to check - it was the same, namely, the resistance between each "signal" out and ground (black wire) was about 5-7 mOhms. Between different coil outs (any) it was infinity.
If you look at the service manual diagram - well, that can't be. Well, hundreds of ohms or kilo-ohms, I suppose there should have been.
But if there's a break - how does it start and work (it works poorly, but it works)???
Also confusing is the intriguing info in the service manual:
"The resistance of the starting coil is not measured. Check the starting coil as suggested in the chapter "Checking the output voltage on the CDI" - "Checking the output of the starting coil"
The question is - is the trigger looks like failed? Then why does the engine start? I wouldn't want to just remove the flywheel for nothing.
Can someone tell me - should I dig in the direction of the starting coil, pull off the flywheel, or look in the other direction based on the symptoms described above?
Thank you in advance!