I tried to fire up the engine in the rupp roadster that I just got..The carb is fubar so I just put a few drops of gas down the spark plug hole to see if she would run..It was very hard to pull over..In fact it seemed like when it would fire it would almost lock up the engine and I would actually lift the rear wheel right off the ground when pulling the cord!..It did eventually run for a few seconds so the engine is mechanically sound..I am wondering if the timing could be too far advanced?..Is it adjustable?
HS 40 is the timing adjustable?kicks back)
- Thread starter oldyeller
- Start date
- Tags adjustable?kicks back) timing
im interested to see what the guys have to say as i have a motor H60 that does the same thing. I had the motor apart. There were line-up marks on the cam and gear on this motor. if the inards all line up, and your points are set properly i think your good to go?:shrug: I hope others will chime. Im curious. i not an expert on timing although id like to learn more about it.
well when you get the flywheel off you will be able to check the points they are some what adjustable but i had one the key sheered but only moved a small amount and caused it to run sparaticly I also have seen to long of the lower shroud bolts dig into the flywheel you just have to take it apart and look for starts
here you go guys. read want randy posted at the bottom page. that should fix your problem.:thumbsup:
http://www.oldminibikes.com/forum/tecumseh-engines/21139-4hp-lighting-coil-question.html
http://www.oldminibikes.com/forum/tecumseh-engines/21139-4hp-lighting-coil-question.html
I have 2 raodster 2's now. Timing could be the issue. However my 70s Manco has a 2004 H40 and this engine has an automatic compression release inside the engine. It's located on the back of the cam gear. I would expect if the mechanism gets jammed or is missing, the engine would be much harder to pull. You'll have to split the case to investigate this one so you may want to try the timing fix first.
I don't know about compresion release.. But in the older motor, the compresion release is in the cam lobe... If the valve lash is set too tight, in atempt to delete the compresion release..... Will cause the engine to kick back, if it's running at a real low speed...
Sounds to me like timing too... That is a matter of setting the position of the entire coil pack unit.. It bolts on with two slotted holes.. Ya loosen the bolts some and spin the whole magneto system, and tighten it down.. Counter clockwise will advance the spark because the magnets line up, and points fire sooner....... Clockwise makes everything rotate farther before everything fires, so it retards the spark....
Sounds to me like timing too... That is a matter of setting the position of the entire coil pack unit.. It bolts on with two slotted holes.. Ya loosen the bolts some and spin the whole magneto system, and tighten it down.. Counter clockwise will advance the spark because the magnets line up, and points fire sooner....... Clockwise makes everything rotate farther before everything fires, so it retards the spark....