Troy Bilt 21″ 675 Series Briggs & Stratton Carburetor Cleaning & Start Free Lawn Mower! -Mar. 2,2017



This is a follow up of the most recent lawn mower find a free Troy Bilt with a 675 series Briggs and Stratton Engine. The owner could not get this to start put a new spark plug in it and then just listed it for free. Cleaned the carburetor and gas tank it barely would run the first start. They had not gapped the spark plug just installed it out of the box. It runs much better but still has a slight miss in the engine. Will continue to work on this to see if we make it run better.

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11 thoughts on “Troy Bilt 21″ 675 Series Briggs & Stratton Carburetor Cleaning & Start Free Lawn Mower! -Mar. 2,2017

  1. I was going to suggest a seat replacement too but there are some smart cookies already chiming in on that. I have a tecumseh doing the same, that I need to order some seats for, thanks for the order reminder 🙂

  2. That mower is starving for fuel. when you put the float on it wasn't moving down all the way and won't fill the bowl with enough fuel. most likely a swollen seat in the carb.
    My tip on the oil. I keep some used oil on hand that's not in bad condition and use it for oil flushes on these type engines when they come by. Don't like to waste new oil.

  3. I'm thinking what Pete is, hopefully it's just a partially sheared flywheel key. Seems like the 675 series are the worst at shearing them for some reason. They by far are the ones I have to replace them in the most. But good job on getting it running again!

  4. I've found the best time to change oil is right after running the engine so it's hot. All the sludge is stirred up off the bottom and viscosity is low so when dumping the oil it comes out fast with all that garbage still suspended in a the oil.

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