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kelli First thing to check. On the starter solenoid just to the right of where the pos + cable from the bat connects, there is a flat spade terminal. There should be a wire connected that comes from key switch. (the only flat connector) This wire sometimes works its way loose. If that works you are back in business. If the wire is connected and it wont crank, try jumping the pos+ connector to the nut on the right side of the spade connector. It should crank. When you get that far come back and describe what you found and we will go further.

Motojoe----I have to partially disagree with you on this one. That engine ( problably an EH65 ) has a 12vdc fuel cutoff which eliminates the float abd needle situation. That is on a two barrel carb. I'm not familiar with the single barrel. OP needs to be more specific. Ed is this happening all the time or when running or when turning off? First thing is you need to take the seat belts out of the air cleaner. Lol..... That won't fix your problem! Describe in detail and how long this has been happening. Is the carb a single barrel or twio barrel.. We'll try to help `you.

Russ When I fabbed the first mount A belt dealer went to great lengths to find one`. He finally found one like you about 47" but only available in a width of about 1". This belt didn't last any time and it shredded. I modified my mount to allow the stock belt tio fit. On the stock belt, do some googling. I found one under 100.

I. Fabbed a new motor mount for. That purpose. You have to check clearance on the shifting lever. If u are unable to do that you will have to call the belt dealers online till u find one that will help you. They are cheaper anyway.

Russvato What engine do you have in the BD300? The link I provided above fits an L3 which is not the same as a BD300. If you have a kohler engine the part # you need is 2*20693.and are cheaper belts out there. Just google.

try this link https://hammerheadperformance.com/american-landmaster-belt-l3-cvt-drive-belt-19719-replaces-2-20694-17918

Just where would this evidence be found?

Dennis See post 10 and 11 for shifting and 15 to adjust belt

SHIFTING ISSUES WITH ALL BULLDOGS Find your manual or look up one online . Find the section on adjusting shifting cables and follow them to the "T". Don't skip any steps thinking this is easy. Don't ask me how I know! It all starts under the hood, not behind the seat. Don't skip any steps!

Russvato, You say belt is too tight. Have you loosened hold down bolts on engine and let it slide backwards. that's how you adjust tension on these machines.

Do you have the single throat or two barrel carb? What is it doing that makes you think it is the needle valve? I would have to tear into it more than I want to for pics of the detail. If you can't look at it and see what is required I don't recommend you attempting it. Again, what is it doing that makes you think it is the needle valve. You can get overhaul kit for briggs two barrel online relatively inexpensive and the internal parts should fit the Subaru carb. Another thing you can try is lapping your needle valve with a small amount of toothpaste. Sometimes that will fix it up.

Not familiar with your machine but sounds like an air leak to me. Check all gaskets and hoses.

What a find.

Wow--What a Christmas gift. Predator or Subaru?

@EGY You can get a copy of the manual here. It might cost you a few bucks but it won't let me forward my copy. https://subaru-robin.servicemanualvault.com/Subaru-Robin-EH65-Engine-Service-Manual.html