Hi everyone, I’m new to the forum and new to nitro but not new to RC cars; I have a few electric cars that I mess with.
I recently bought a pre-owned HPI Savage X 4.6 for my son. It started and ran great until recently. The other day the brakes failed and it rolled quickly into a parked car tire, loosening the exhaust and all...loud. Further inspection showed it took some teeth out of the spur gear but still drivable. I adjusted the brakes to be more firm.
Then, I felt it was running too rich because I was going through a tank every 6-7 min. I adjusted the tune and drove around. It felt sluggish and the brakes failed again and noticed a broken brake plate on the ground; put it away for the night.
Just today I tried starting it and wouldn’t turn over with the roto start gun. So I used my deWalt cordless driver (bad idea). It still wasn’t starting but heard a clanging noise. Then suddenly the ball at the end of the roto start shaft broke off! The engine seemed fine to turn over (but not start) I don’t understand what happened. I was able to cut that piece off and file down the hex end to fit back into the roto start in the truck. It started right up. It died shortly after because my idle was too low from messing with the tune. I tried starting again and the roto start in the truck just kept spinning; a different sound than before. It appears there is a small crack in a copper/brass piece on the shaft just before the clutch bell.
What did I do to this poor truck? So upset. Did I strip my gears in the roto start system? Did I ruin my clutch bell? I’m not sure what to fix or what to replace. Can a bad tune affect starting? As in, make it so hard to crank over that it sheered off the roto start shaft end? Please help, I’m so lost.
This is a terrible opening post but hoping someone can share some advice. Feel bad since it’s my 10yr old son’s truck and just haven’t had any luck with it. Thanks
I recently bought a pre-owned HPI Savage X 4.6 for my son. It started and ran great until recently. The other day the brakes failed and it rolled quickly into a parked car tire, loosening the exhaust and all...loud. Further inspection showed it took some teeth out of the spur gear but still drivable. I adjusted the brakes to be more firm.
Then, I felt it was running too rich because I was going through a tank every 6-7 min. I adjusted the tune and drove around. It felt sluggish and the brakes failed again and noticed a broken brake plate on the ground; put it away for the night.
Just today I tried starting it and wouldn’t turn over with the roto start gun. So I used my deWalt cordless driver (bad idea). It still wasn’t starting but heard a clanging noise. Then suddenly the ball at the end of the roto start shaft broke off! The engine seemed fine to turn over (but not start) I don’t understand what happened. I was able to cut that piece off and file down the hex end to fit back into the roto start in the truck. It started right up. It died shortly after because my idle was too low from messing with the tune. I tried starting again and the roto start in the truck just kept spinning; a different sound than before. It appears there is a small crack in a copper/brass piece on the shaft just before the clutch bell.
What did I do to this poor truck? So upset. Did I strip my gears in the roto start system? Did I ruin my clutch bell? I’m not sure what to fix or what to replace. Can a bad tune affect starting? As in, make it so hard to crank over that it sheered off the roto start shaft end? Please help, I’m so lost.
This is a terrible opening post but hoping someone can share some advice. Feel bad since it’s my 10yr old son’s truck and just haven’t had any luck with it. Thanks