Greetings all. My son and I just acquired a Yerf Dog Scout. We don’t know a lot about these machines and it seems the information online is rather limited in comparison with many other yerf dog products.
It currently does not run. Here are some of the issues we have found so far.
1) The starter solenoid is not getting it’s “signal” to close.
2) Gas was very old
3) No spark
4) Fuel pick up tube inside the tank had dry rotted and broken into pieces
5) As with many old farm vehicles, the wiring has had…..modifications to be nice.
6) Very crude and home chain tensioning system.
7) Actually this one is a plus, the rear has had shocks/springs added.
It will crank over (when the starter solenoid is jumped). That’s the first issue. The starter solenoid does not appear to be getting its ”signal” to close the solenoid. The only wiring diagram I have found leaves a lot to be desired. The wiring colors do not match and a few other differences. Due to problem number 5….we found a replacement wiring harness for the engine for a good price. Figured once it came in, we would start digging further into the starter solenoid problem.
Plan on replacing the fuel filter and all fuel lines since the are old, brittle, and been sitting with old gas in them for who knows how long. After that, we will be able to see if there is anything going on with the carb. The previous owner did buy and swap a new carb onto it so Im not sure if we are going to have any issues there or not.
As far as the spark, the plug looks BRAND NEW. To the point that i dont think it has actually ever fired. We did see that the CDI box was missing too. We had another knock off cdi box and put it on the buggy to see if maybe that was the issue. No such luck, but we aren’t sold that it is necessarily the correct one. It came with another kart we got years earlier. It’s the ever so common “racing cdi box” that is online. Once again, after the wiring harness has been replaced and we can feel confident there wasnt some other broken/cut wires causing the issue, we plan to replace the cdi if necessary.
I was hoping maybe someone on here had some experience with these machines and might have a better wiring diagram for us to reference. Also, it seems there are 2 different types of wiring for the stator? Some came with 4 wires and some with 5? Can someone shed a little light on the connections for each of these wires and which came on these engines factory? Remember it had several back yard modifications so Im not sure what i can trust and what i cant. Thanks in advance.
It currently does not run. Here are some of the issues we have found so far.
1) The starter solenoid is not getting it’s “signal” to close.
2) Gas was very old
3) No spark
4) Fuel pick up tube inside the tank had dry rotted and broken into pieces
5) As with many old farm vehicles, the wiring has had…..modifications to be nice.
6) Very crude and home chain tensioning system.
7) Actually this one is a plus, the rear has had shocks/springs added.
It will crank over (when the starter solenoid is jumped). That’s the first issue. The starter solenoid does not appear to be getting its ”signal” to close the solenoid. The only wiring diagram I have found leaves a lot to be desired. The wiring colors do not match and a few other differences. Due to problem number 5….we found a replacement wiring harness for the engine for a good price. Figured once it came in, we would start digging further into the starter solenoid problem.
Plan on replacing the fuel filter and all fuel lines since the are old, brittle, and been sitting with old gas in them for who knows how long. After that, we will be able to see if there is anything going on with the carb. The previous owner did buy and swap a new carb onto it so Im not sure if we are going to have any issues there or not.
As far as the spark, the plug looks BRAND NEW. To the point that i dont think it has actually ever fired. We did see that the CDI box was missing too. We had another knock off cdi box and put it on the buggy to see if maybe that was the issue. No such luck, but we aren’t sold that it is necessarily the correct one. It came with another kart we got years earlier. It’s the ever so common “racing cdi box” that is online. Once again, after the wiring harness has been replaced and we can feel confident there wasnt some other broken/cut wires causing the issue, we plan to replace the cdi if necessary.
I was hoping maybe someone on here had some experience with these machines and might have a better wiring diagram for us to reference. Also, it seems there are 2 different types of wiring for the stator? Some came with 4 wires and some with 5? Can someone shed a little light on the connections for each of these wires and which came on these engines factory? Remember it had several back yard modifications so Im not sure what i can trust and what i cant. Thanks in advance.
It will shock you but there is not a GOOD, CONSISTENT spark on the plug. I have seen it spark at the plug intermittently, but not consistently or even very often for that matter. 
It is in fact a *utility* UTV.