Supercapacitors for starting motor

[Beck]

Does anyone have experience with using supercapacitors for motor starting?

In my latest little tractor build I installed a garden tractor battery. I need to start a 3.7L four cylinder motor with 11.5 compression. I now doubt that the small battery will be able to do that. I am wondering if I can add a bank of the supercapacitors to give it the starting power it needs.

It would be a pain to cut out the battery mount in the front of the tractor to install a bigger battery. I have built a lot of stuff around that mount and battery size that would all need to be changed.

[enjenjo]

I have a jump box with capacitors in it. It's not recommended for starting a car. But....I have done it several times with no apparent damage. I've also run a winch motor on it for up to 20 minutes at a time without it dropping below 12 volts. In my race car I had a small battery in the car for the ignition, and a  jumper battery connected to the starter with an Anderson plug that we would unplug after starting.  https://www.amazon.com/anderson-connector/s?k=anderson+connector

[kb426]

I don't know about the battery but all the newer permanent magnet starters seem to take less energy to do their job. Starter with real ball bearings and going from there. Maybe one of the offset geardrives might be the answer. One of those high priced lithiums might be an answer.

[58 Yeoman]

Beck, we need pictures of this tractor.