best lawn mower toro image
M
I have the following Toro lawn mower. The lawn mower engine showed a continuous decline in running time. Five weeks ago, the lawn mower continued to run in perfect order. As time passed by, the engine would not run as long. The engine would run, but die after a certain time. The engine running time continued to decrease as time passed by. Now, the engine will not start.
Toro 6.5 horsepower GTS lawn mower
Toro model number 20017
Toro serial number 240121813
Tecumseh Power Company
engine model number: LV195EA
spec: 362003B
engine family: 4TPXS.1951BC
Round one: We replaced the spark plug and air filter. The engine would run for one or two seconds.
Round two: We removed and cleaned the small metal bowl attached to the carburetor with carburetor cleaner. We removed and cleaned the main jet by using a small wire. We filled the fuel tank with one-week old 87 octane unleaded fuel. The engine would run for one or two seconds.
We drained the fuel tank and filled the tank with fresh 93 octane unleaded fuel. The engine continue to run! Hurray! We pulled the starter cord an hour later and the engine continue to run! Hurray! Two successful tests made me very happy.
When I transported the lawn mower from my friend's home to my home, I pulled the starter cord. The engine failed to start! The engine would not even run for one or two seconds.
I wanted to try starting the engine the next day.
Round three: The next day, I pulled the starter cord and the engine would not start. The engine would not even run for one or two seconds.
We cleaned the fuel tank with carburetor cleaner and the tiny mesh screen that serves as the fuel filter. We rinsed the fuel tank with fresh 93 octane unleaded fuel twice and refilled the tank with fresh 93 octane unleaded fuel.
We applied carburetor cleaner through the fuel line between the fuel tank and carburetor. We applied carburetor cleaner to the float in the small metal bowl. We did not fully disassemble the carburetor.
I pulled the starter cord and the engine would not start. The engine would not even run for one or two seconds.
Round four: We removed the spark plug. We re-attached the spark plug cable to the spark plug and placed the spark plug near the engine block. While pulling the starter cord, we noticed an spark. That is good.
We sprayed starter fluid in the carburetor. After pulling the starter cord, the engine will not start.
We noticed the rubber hose between the fuel tank and carburetor had a crease! We replaced the original rubber hose and original clamps. The rubber hose is rated as a fuel hose. We pulled the starter cord and the engine started! Hurray!
We pulled the starter cord again and the engine started!
Round five: I pulled the starter cord the next day, but the engine speed increases and decreases. The increase and decrease of engine speed repeats. After a minute or two, the engine eventually stops. When I pull the starter cord again, the engine will not start.
Does anyone have any suggestions?
Thank you again for your help and guidance.
-Mark
Answer
It sounds like you may still have dirt or grit clogging the internal passages of the carb which block the flow of fuel periodically. If untreated gas was left in the fuel tank and carb float bowl for an extended period, it can also turn varnishy which can clog or gum up tiny fuel passages in the carb...requiring a thorough cleaning. Since the engine does start and run at times, it doesn't sound like an ignition problem unless it does have a periodic ignition issue...test for good spark each time it does not start to eliminate that as an issue...defective coil or igniter, bad plug wire, . Usually, if you have good spark, the engine should start by spraying some carb cleaner into the carb throat or pouring a little gas in the spark plug hole...if no start, you may have valve or timing problems if all other system are OK...choke is set right, etc.... The engine speed fluctuation also indicates possible fuel issues...clogged passages in the carb or the governor sticking.
At this point for round six, I would make sure you are getting good spark each time when starting and remove the carb float bowl and clean out any small passages and the fuel bowl nut with carb cleaner and a small pin or needle to dislodge any grit...you may have to remove, disassemble and clean the whole carb and install a new gasket/seal kit...or replace the carb. Do not spray carb cleaner into the fuel intake port (where the fuel hose attaches) or the float needle valve or seat as it can degrade them.....make sure the float is properly adjusted for the correct level and does not stick....a carb rebuild kit usually has a sheet with specs on float level. Gasoline sold with ethanol can degrade gaskets and seals over time which can crumble into bits and clog internal carb passages....try to buy gas that has no ethanol added or use Seafoam additive to offset ethanol issues. Always add products like Stabil or Seafoam to the fuel tank to preserve gas when stored. And finally, if the mower blade hit some hard object like a rock or tree root, etc.., it could have snapped or damaged the crank/flywheel key which can make the engine out of time and cause issues with hard starting.
Related info on no start issues...
"If the small engine does not start, the carburetor might be clogged or have bad fuel in the float bowl. If old fuel was left in the small engine for a long time some of the volatile ingredients may have evaporated, leaving a thicker, stickier product that is more like varnish or shellac. This sticky fuel can clog up the small jets and ports in the carburetor and it can be difficult to burn making it hard to start the engine. The only solution is to drain the old fuel from the float bowl and thoroughly clean the carburetor with carburetor cleaner. If that isn't effective, replace the entire carburetor."
http://www.repairclinic.com/RepairHelp/How-To-Fix-A-Small-Engine/163-329-804945-/Tecumseh-Small-engine-won-t-start-LV195EA362076D
http://www.justanswer.com/small-engine/2b0wc-own-toro-mower-tecumseh-engine-lv195ea-lv195xa.html
http://forums2.gardenweb.com/forums/load/lmower/msg0811041413422.html
http://www.doityourself.com/forum/outdoor-gasoline-electric-powered-equipment-small-engines/449577-tecumseh-start-problem.html#b
Toro GTS stalling issue...cleaning bowl bolt holes...
http://www.youtube.com/watch?v=51W3g7Q1c-E
Carb cleaning...
http://www.youtube.com/watch?v=ultzCF9Wj4I
It sounds like you may still have dirt or grit clogging the internal passages of the carb which block the flow of fuel periodically. If untreated gas was left in the fuel tank and carb float bowl for an extended period, it can also turn varnishy which can clog or gum up tiny fuel passages in the carb...requiring a thorough cleaning. Since the engine does start and run at times, it doesn't sound like an ignition problem unless it does have a periodic ignition issue...test for good spark each time it does not start to eliminate that as an issue...defective coil or igniter, bad plug wire, . Usually, if you have good spark, the engine should start by spraying some carb cleaner into the carb throat or pouring a little gas in the spark plug hole...if no start, you may have valve or timing problems if all other system are OK...choke is set right, etc.... The engine speed fluctuation also indicates possible fuel issues...clogged passages in the carb or the governor sticking.
At this point for round six, I would make sure you are getting good spark each time when starting and remove the carb float bowl and clean out any small passages and the fuel bowl nut with carb cleaner and a small pin or needle to dislodge any grit...you may have to remove, disassemble and clean the whole carb and install a new gasket/seal kit...or replace the carb. Do not spray carb cleaner into the fuel intake port (where the fuel hose attaches) or the float needle valve or seat as it can degrade them.....make sure the float is properly adjusted for the correct level and does not stick....a carb rebuild kit usually has a sheet with specs on float level. Gasoline sold with ethanol can degrade gaskets and seals over time which can crumble into bits and clog internal carb passages....try to buy gas that has no ethanol added or use Seafoam additive to offset ethanol issues. Always add products like Stabil or Seafoam to the fuel tank to preserve gas when stored. And finally, if the mower blade hit some hard object like a rock or tree root, etc.., it could have snapped or damaged the crank/flywheel key which can make the engine out of time and cause issues with hard starting.
Related info on no start issues...
"If the small engine does not start, the carburetor might be clogged or have bad fuel in the float bowl. If old fuel was left in the small engine for a long time some of the volatile ingredients may have evaporated, leaving a thicker, stickier product that is more like varnish or shellac. This sticky fuel can clog up the small jets and ports in the carburetor and it can be difficult to burn making it hard to start the engine. The only solution is to drain the old fuel from the float bowl and thoroughly clean the carburetor with carburetor cleaner. If that isn't effective, replace the entire carburetor."
http://www.repairclinic.com/RepairHelp/How-To-Fix-A-Small-Engine/163-329-804945-/Tecumseh-Small-engine-won-t-start-LV195EA362076D
http://www.justanswer.com/small-engine/2b0wc-own-toro-mower-tecumseh-engine-lv195ea-lv195xa.html
http://forums2.gardenweb.com/forums/load/lmower/msg0811041413422.html
http://www.doityourself.com/forum/outdoor-gasoline-electric-powered-equipment-small-engines/449577-tecumseh-start-problem.html#b
Toro GTS stalling issue...cleaning bowl bolt holes...
http://www.youtube.com/watch?v=51W3g7Q1c-E
Carb cleaning...
http://www.youtube.com/watch?v=ultzCF9Wj4I
Why does my new Toro lawn mower idle up and down?
Ralph_T
I just bought a new Toro lawn mower (recycler type) from Home Depot last year in June. It ran great all last year but this year after changing the oil, adding fresh fuel and starting it up it spits and idles up and down.
Answer
If you added fresh fuel it sounds like you may not have properly stored your mower for the winter season. If so you may have to remove all the fuel and then remove the carburetor, disassemble it and clean it.You can first try adding a product like Sea Foam or something similar to fresh fuel and let it run. Good Luck
If you added fresh fuel it sounds like you may not have properly stored your mower for the winter season. If so you may have to remove all the fuel and then remove the carburetor, disassemble it and clean it.You can first try adding a product like Sea Foam or something similar to fresh fuel and let it run. Good Luck
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