I bought a new troy built backpack blower mod#tb4bp at lowes there was no operators manual with it. Can i print a copy at this sight? Regards CH

Normally it means that the carburetor is plugged by stale fuel and the fuel pump and metering diaphragms are stuck on the check valves. Cleaning and diaphragm and gasket replacements are needed. You may want to investigate the cost of a new carb versus the time and cost of repair parts.

I’m happy to assist further over the phone at https://www.6ya.com/expert/rolandw_c013176d62ee17ae

William, could not find your exact model, the links below should help as a lot of blowers and string trimmers pull ropes are changed using similar method.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Quick and Easy Homelite Weed Wha cker Starter Pull Cord Replacement

How to fix string starter recoil on small outdoor power equipment like...

How to Install Pull Start Recoil for Backpack Blower

Don, Instead of me writing a book to ya on how to do this. A much much easier way to do this is to go on you tube.com

In the search menu, type in how to replace starter pull rope on (make) leaf blower...etc..

This way you will have visualization to go along with the instructions.

It's not super difficult, you can do this!! Good luck

try getting a new carb 25 or 30 bucks rebuild kit about 18 bucks so it one or the other, good luck.

Fan may be worn where it sits on the shaft. May need to replace it.

crankcase could be full of fuel causing it to hydro lock take plug out and see if it will pull over be carefull though if it's hydro locked with fuel it will pump out of the sparkplug hole. the rope may be off of the starting pully as well

You can find your manual here:
http://manuals.mtdproducts.com/mtd/Safety.do?BrandCode=10001&pid=235248&model_num=TB4BP&serial_num=100063&filename=769-03148c.pdf
You must choose accept to open or download the manual.
769-03148c.pdf is the file name.
Or go to this page and click View manual after entering your model and serial number:
If you do not know your serial number enter 100679 and you will still see your manual.
http://manuals.mtdproducts.com/mtd/Public.do?BrandCode=10001

7.9 Mb download! The informatiion you seek is in the manual on page 8.

SAE 30 SF or SH or SG (3.04 fl oz total capacity to be changed every 25 hours)

Thanks for choosing FixYa,
Kelly

no it sounds as though you have a bad coil