18V to stock system.

[tk.graham]

Would 18V to the stock system be ok?

 

[MaxMidnight]

I'm no expert but probably not as many of the electrical components are designed to work with 12v.

I have to ask...why would you want to?

 

[tk.graham]

Just trying to get it started.
Battery seams weak.
Also to run No2.
I would only use 18v intermittently, but don’t want to fry anything.

 

[VMAXXIMUM]

Channeling my inner MaxMidnight, why would you risk frying your electrical system on a whim? Test the battery to verify its condition. At the very least put it on a charger. I would imagine 18v would cook your ecu and probably the vboost controller.

 

[Fire-medic]

No do not! 18V DC will give you smoked components.

 

[MaxMidnight]

Just trying to get it started.
Battery seams weak.
Also to run No2.

It would be helpful if you explained the symptoms you are getting when trying to start.

Assuming this is a new problem and an issue is slow turnover then rather that ignoring what the causal issue is you need to start by doing some basic diagnosis.
Start with the battery. How old is it and, have you measured the voltage or specific gravity of the electrolyte. Have you tried to charge it?
Have you cleaned all of the earths?
Have you got fuel in the carbs?

Once you have it running then you can establish why, I assume, #2 isn't firing.