Need Help With Stumbling Kohler
Posted August 04, 2012 - 06:31 AM
Blew out fuel line and checked flow, new fuel filter, use high test gas, previous owner put a new Welbro carb on it, new coil, cleaned points & plug, thought it might be vacuum leak (smoothed out when sprayed with carb cleaner) replaced carb & spacer gaskets.
The motor runs strong with no noticable smoke or oil consumption. When it does stumble the carb does not feel hot. Our weather has been in the mid to high 90's and running with or without sides makes no difference.
What am I missing?
Posted August 04, 2012 - 06:54 AM
Posted August 04, 2012 - 07:27 AM
Fuel lines deteriorate on the inside. You may have picked up a small piece of rubber and it is sitting on the bottom of the bowl.
Have you taken the float bowl off and checked?
Posted August 04, 2012 - 08:25 AM
Posted August 04, 2012 - 09:36 AM
Posted August 04, 2012 - 10:07 AM
Posted August 04, 2012 - 10:24 AM
Posted August 04, 2012 - 11:03 AM
Edited by Alc, August 04, 2012 - 11:04 AM.
Posted August 04, 2012 - 08:15 PM
Posted August 06, 2012 - 09:15 PM
Posted August 07, 2012 - 11:04 AM
I thought it might be a vacuum leak because it cleared up when i sprayed the connection between the carb and the block, but new gaskets didn't help. When it stumbles pulling the choke out has no effect on it.
Mike does it still smooth out when you spray carb cleaner around the carb and intake? perhaps there is some warpage between the mating surfaces of the carb and manifold or a crack in either one.
Posted August 07, 2012 - 02:36 PM
Start by dropping the bowl and you should only be able to raise the float to where it is level (without forcing). If it is level, try bending the tab to allow it to go a little above level... you can always set it back.
Posted August 07, 2012 - 10:31 PM
Posted August 10, 2012 - 06:29 PM
Posted August 10, 2012 - 10:08 PM
One other thing you may not have considered is the 'elbow on the side of the carb that comes from the fuel line to the tank may become 'somewhat' obstructed which would also give the symptom of starving...I just cleaned the 145's carb today and although it soaked in carb cleaner for a day, I still had to remove the elbow to see just how much 'crud' had accumulated at the elbow, once the elbow was off, and cleaned thoroughly, I had to remove the float and main jet to clean the inside of that out with a pin as well...yes there was a lot of accumulation in there and no amount of 'seafoam' or other carb cleaner was gonna resolve it...so you may have to take it off and clean and flush each passage one at a time...good luck. FYI I could not believe mine could run with it being as obstructed as it was...
Edited by NutCASE, August 10, 2012 - 10:10 PM.