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| Jan Ridders Otto 4 stroke build |
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| MrFluffy:
Probably a little late in the day, but on short duration between rebuild bike engines (say under 300 hours), its a preferred option to use a tool steel gudgeon (wrist) pin narrower than the outside diameter of the piston, with teflon buttons either end to make up the pack spacing to the width of the piston. It does eventually polish the bore, but at that point its long past rebuild time anyway and it is a lot less painful than having a circlip pop out mid pass and causing mayhem inside. I think for a model engine it would be just fine wear wise. |
| dbvandy:
Got Gas... Got Spark... Got To Go!!!!!!!!!!!!!!!!!!!!!!!!!!!! THE OTTO LIVES!!!! I had another coil from junk weed eater and I got tired of waiting for the lighters to get here, so I epoxied some neo magnets to the flywheel and used one of the original coil mounting brackets from the Webster to mount the coil to the Otto. I also used the working vapor carb from the Webster, but will make one just for this engine soon. Not looking for pretty right now, just want to hear some pop... After some eyeball timing, I pulled the cord and it popped popped... but, it kept jumping ignition time, retarding about 45 degrees, I would reset, it would fire 4-5 times, then jump time 45 degrees again. Turns out the three tiny 8-32 set screws did not have enough bite to hold the flywheel on the 8mm shaft, so I tapped them out for 1/4-20 set screws and all is well. will probably thread the end of the crank shaft and put on a locking nut and star washer. Then she came to life after some fine tuning of the intake and exhaust timing. But, the camera battery died so this is all for now... Got too late to run it more because everyone was in bed, so I will fine tune it more tomorrow... More to come... Yeah..... Doug |
| Bogstandard:
Very well done indeed Doug. A good informative post and a runner at the end, what more could we ask for? Bogs |
| sbwhart:
Great Job Doug Excelent thread with a running engine completed. :clap: :clap: :clap: :clap: :clap: :clap: :clap: Stew |
| saw:
Nice gratilations :clap: |
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