First Bash Pics

[Redline]

Hi guys,

Went out today for my first bash with the Baja.

Was a lot of fun, unfortunately after about half an hour the engine cut out and I couldnt get it started again so my time was cut short. I think I have a failsafe issue, so some testing to be done.

Here are a few pics of course ;)














^ me trying to "will" it to start

[FastEddy]

You were tearing it up out there.

Did the engine stop and not start again?
Are you running a Pico?

[Redline]

Yeah it did....stopped dead in the middle of the oval.
Went to start it again and didnt even want to fire.

Yes its a Pico mate, this one specifically - http://www.davesmotors.com/s.nl/c.88...t.A/id.3560/.f. Why is that?

[watercooledvw]

nice shots thanks for sharing.

[HarleyDan]

Disconnect the wires between the pico and the kill switch/engin and make certain that they don't tough each other or any thing else and then re-try. I troubleshot one of mine for a while because I didn't realize that I accidentally pressed the kill button on the radio.

Let us know what you find........

[Redline]

I will do that mate and see how I go with it.

I dont think I hit the kill switch on the radio...even if I did, I should have been able to restart it yeah?

[Redline]

Ok, so I disconnected the wiring from the Pico and took the Pico out of CH3 in the Receiver.

Still nothing, won't start or seem to want to start.

Any other ideas?

Faulty Stop switch?

[HarleyDan]

Originally Posted by Redline

Ok, so I disconnected the wiring from the Pico and took the Pico out of CH3 in the Receiver.

Still nothing, won't start or seem to want to start.

Any other ideas?

Faulty Stop switch?

Could be. Especially if you are running in grass or something. That happened to my brother-in-law. No easy way to check that except to take the fan cover off and disconnect the switch and either try to start or measure the resistance of the switch.

By the way, all this 'trying to start' will definitely flood the engine. Keep that in mind.......

Good luck.

[Redline]

Originally Posted by HarleyDan

Could be. Especially if you are running in grass or something. That happened to my brother-in-law. No easy way to check that except to take the fan cover off and disconnect the switch and either try to start or measure the resistance of the switch.

By the way, all this 'trying to start' will definitely flood the engine. Keep that in mind.......

Good luck.

Thanks mate. Why would grass do it?

I am keeping that in mind....plug is still dry and working at the moment.

[HarleyDan]

Originally Posted by Redline

Thanks mate. Why would grass do it?

Grass gets sucked up into the engine cooling area and the fan forces the grass into the switch. Back when I used to run the body, I had that problem.

I removed the fan cover and there was grass forced into the switch which damages the switch.

[HarleyDan]

Originally Posted by Redline

.plug is still dry and working at the moment.

You know, the more I think about this the more that it bothers me. If you pull the starter 10 or so times and the plug and cylinder is dry, you must have a fuel problem.

Either the fuel is being pinched/restricted or the carb has a problem. That plug should get wet.....

[Redline]

Originally Posted by HarleyDan

Grass gets sucked up into the engine cooling area and the fan forces the grass into the switch. Back when I used to run the body, I had that problem.

I removed the fan cover and there was grass forced into the switch which damages the switch.

Thanks mate, I will have a look when I get home.

[HarleyDan]

Originally Posted by Redline

Thanks mate, I will have a look when I get home.

I also trimmed away a fair amount of the black plastic shroud......

[Redline]

Ok so there was no grass in there.

I removed the original switch and plugged a new one on. That didnt work either. Still won't start.

I am at a bit of a loss now, any ideas?

[robmob]

Did you make sure your plug is still sparking?

[Redline]

Yep still got spark, the end of the plug is gray in colour.

I have air bubbles in the clear fuel line, could this be it?

[HarleyDan]

Originally Posted by Redline

I have air bubbles in the clear fuel line, could this be it?

Ummmm...... You should pump the primer once or twice after all air has been purged; at least that's what I do.......

Also, remove the kill switch all together until you have figured this out. If/when it starts, just chock it and it should die.

I'm gonna go back and re-read to remember where we are at

[HarleyDan]

Originally Posted by HarleyDan

You know, the more I think about this the more that it bothers me. If you pull the starter 10 or so times and the plug and cylinder is dry, you must have a fuel problem.

Either the fuel is being pinched/restricted or the carb has a problem. That plug should get wet.....

Let me reiterate the above point. If the plug is not getting wet, there is a problem with the fuel supply or the carb.

I am going to pretend that you know nothing here (I don't know what you know):

1) Is the fuel tank full?

2) Did you check to make sure that the fuel line (black) is NOT kinked or twisted and IS connected to the carb?

3) Are you choking the engine?

4) Is the fuel clunk still attached to the fuel line in the tank (heavy foam cover fuel pickup)

5) How large are the bubbles in the return line?

6) Do you feel resistance in the primer bulb when pumping or does it collapse easily?

If all the above check out ok, then all I can think of is the carb, provided that there really is no fuel getting into the engine......

[Redline]

Ok...this is my first Gas RC, I'm not new to engines though (whether that makes a difference or not it probably doesnt matter...haha)

Plug is not getting wet.

1. Tank is fuel (new fuel).

2. Fuel line is not kinked.

3. Yes I am choking the engine (have tried both though)

4. Yes it is still connected from what I can see.

5. Bubbles in the return line vary in size depending on depressing of the primer bulb...can be 25mm long or 5mm long and can be up to 4 or 5 in the line.

6. There is resistance in the primer bulb, it does not fill completely with fuel when pressing it (only about 2/3).

Thanks for your help.

[HarleyDan]

Well bro; I personally think that the bottom line here is that you are not getting fuel into the engine; your plug does not get wet.

My last guess is that you have a carburetor problem.

If it were me, I would buy this:

http://www.davesmotors.com/s.nl/c.88...t.A/id.4111/.f

Install it and if it works, contact HPI for a new warranty carb. Either way, a spare carb is a good idea.

I simply cannot think of anything else that would stop fuel flow, that we have not already covered. Sorry man; that's all I know.......... :bagface: