I have a lawnmower with Briggs & Stratton 375 Sprint engine that is very difficult to start. Any help please?
peterdavis1965 asked:
I have changed spark plug, air filter and cleaned out old petrol and replaced with new. Still won’t start. Has always been difficult to start.
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I have changed spark plug, air filter and cleaned out old petrol and replaced with new. Still won’t start. Has always been difficult to start.
April 11th, 2009 at 1:03 pm
There will be a magnet on the flywheel that passes the magneto (the spark plug wire leads from the magneto). If a mower is left out in the elements, the facing surfaces of the magneto and flywheel can rust, which prevents the magneto from generating the required spark. You can clean off the rust with emery paper or (my preference) a fine drywall sanding sheet. A LIGHT coat of oil on the sanded surfaces will help prevent more rust.
There are a number of possible causes; this is only one.
April 11th, 2009 at 11:56 pm
N.Cognito,s advice sounds pretty good, I’m not familier with you’r exact engine,but, if you were to get some starter fluid and spray some into the carb. intake (it should have some type of filter you may have to remove first) prior to starting and it aids in starting ,that would be a clear indicator that it is a fuel flow problem,if you are the least bit mechanical it is not that hard to rebuild/clean the carb.
April 15th, 2009 at 3:17 am
No spark, no run.
Lay spark plug on engine fins and have someone pull string.
You should have a fat blue spark.
Make sure cap is making good connection with coil wire.
DO NOT hold plug while your buddy jerks on line.
If mower is a piece of junk, get a new one.
Now go drink a beer and relax.
April 16th, 2009 at 7:22 pm
The most likely cause of hard starting is the carburetor. It has a diaphram carb setting on top of the gas tank. It is time to rebuild the carb. It is an easy job and the rebuild kit will come with instructions. Just watch how the springs and rods attach to the carb. A digital picture may help before you take it apart. As far as rust on the flywheel goes that is bunk. Magnets don’t care if there is rust.