HI Guys. My name is Shaun. I'm a newbie in this forum and to nitro rc. I'm having an issue with my Hobao hyper ss cage truggy with the Hyper 30 engine that is brand new. For some reason, getting it started is a hassle and not working out. I have the car for three days now, I will give a break down of each day what really happened.
Day1:
In an attempt to start the engine to break it in, the pull starter snapped! Eager to start the car, I used a home drill onto the backplate hex to crank the engine. However doing this led the one way bearing breaking . Called it a day as it was not possible to start anymore.
Day 2:
Managed to get a starter box. The engine started immediately! Used to cut out after 10 seconds or so, so I richened the the lsn slightly until perfect. Idle gap was set to 1mm opening and hsn to factory break in settings. The car idled excellent throughout the entire tank fuel. No hiccups, no wanting to switch off etc. Attempted to start the car when tank was done, but starter box battery was dying so was not able to start it. However the flywheel was feeling way more harder to turn now after letting the engine idle for a tank fuel.
Day 3:
Charged up batteries for glow igniter and starter box. Primed engine and attempted to start. The flywheel was so tight it was impossible for the starter box to turn it. I loosened the glow plug a bit and was able to start the car and then tightened it once the idle settled. The car idled perfect for 20 minutes or so, afterwards I could hear a few hiccups, and the rev was picking up slightly and dropping as if it wants to stall. Eventually the rev picked up very high for a few seconds and engine died. I attempted to start again but had to loosed glow plug. The car started, and after 2 seconds the rev will shoot high a lot and wheels will spin. Tried adjusting lsn to slighting richer but was not helping. Same occurred. The effects were very similar as when you pinch the fuel line and the car would rev up and die.
Eventually the car stopped starting. I confirmed that the glow plug is working. What I noticed was when I blew in the pressure line to prime the engine and get fuel in the carb, the engine would want to start but sounds like not getting additional fuel to continue. Once that fuel burns up in the carb, the car just wouldn't even attempt to start. I then removed the fuel line going into the carb, blocked the stinger pipe to see if fuel was going into the card. I noticed that very little fuel was coming out the fuel line and does not look normal in my opinion. The fuel was just barely coming out the pipe. So my thoughts were there is no fuel going into the carb now. A lot of fuel comes out when I blow through the pressure pipe from the exhaust so I know that's fine.
Could it be that by loosening the glow plug the engine does not have enough compression to draw in fuel? But this started while the car was idling with the plug in tight. Or could there be leaks somewhere causing compression loss?
I would really appreciate any help from you guys to diagnose this!
Day1:
In an attempt to start the engine to break it in, the pull starter snapped! Eager to start the car, I used a home drill onto the backplate hex to crank the engine. However doing this led the one way bearing breaking . Called it a day as it was not possible to start anymore.
Day 2:
Managed to get a starter box. The engine started immediately! Used to cut out after 10 seconds or so, so I richened the the lsn slightly until perfect. Idle gap was set to 1mm opening and hsn to factory break in settings. The car idled excellent throughout the entire tank fuel. No hiccups, no wanting to switch off etc. Attempted to start the car when tank was done, but starter box battery was dying so was not able to start it. However the flywheel was feeling way more harder to turn now after letting the engine idle for a tank fuel.
Day 3:
Charged up batteries for glow igniter and starter box. Primed engine and attempted to start. The flywheel was so tight it was impossible for the starter box to turn it. I loosened the glow plug a bit and was able to start the car and then tightened it once the idle settled. The car idled perfect for 20 minutes or so, afterwards I could hear a few hiccups, and the rev was picking up slightly and dropping as if it wants to stall. Eventually the rev picked up very high for a few seconds and engine died. I attempted to start again but had to loosed glow plug. The car started, and after 2 seconds the rev will shoot high a lot and wheels will spin. Tried adjusting lsn to slighting richer but was not helping. Same occurred. The effects were very similar as when you pinch the fuel line and the car would rev up and die.
Eventually the car stopped starting. I confirmed that the glow plug is working. What I noticed was when I blew in the pressure line to prime the engine and get fuel in the carb, the engine would want to start but sounds like not getting additional fuel to continue. Once that fuel burns up in the carb, the car just wouldn't even attempt to start. I then removed the fuel line going into the carb, blocked the stinger pipe to see if fuel was going into the card. I noticed that very little fuel was coming out the fuel line and does not look normal in my opinion. The fuel was just barely coming out the pipe. So my thoughts were there is no fuel going into the carb now. A lot of fuel comes out when I blow through the pressure pipe from the exhaust so I know that's fine.
Could it be that by loosening the glow plug the engine does not have enough compression to draw in fuel? But this started while the car was idling with the plug in tight. Or could there be leaks somewhere causing compression loss?
I would really appreciate any help from you guys to diagnose this!