Briggs starter not enough power

[jvarvil]

Twin cylinder 18hp Briggs lawn mower engine will not turn over past the compression stroke. It will crank on one cylinder. Will a new starter fix it? Starter rebuild people said it was a good starter.

 

[ILENGINE]

If this is a v-twin OHV then check the valve clearances to make sure they are within spec .004-.006

 

[Mr. Shamrock]

If this is a v-twin OHV then check the valve clearances to make sure they are within spec .004-.006

+1
I replaced a battery for my 20HP B&S and it was just the valve's needing adjusted. It doesn't take them being off too much to cause this issue.

 

[jvarvil]

If this is a v-twin OHV then check the valve clearances to make sure they are within spec .004-.006

There are no rocker arm adjusters on this model. How do you adjust the valves?

 

[Rivets]

Have you made sure that your battery is good? Will it turn over if you jump directly to the starter?

 

[jvarvil]

There was nothing wrong with the valve adjustment or the battery. Our local starter rebuild store had avaliable a heavy duty starter. We put it on and it cranks the motor easily. I believe these mowers were engineered with starters that are too weak. Thanks for the suggestions.

 

[Rivets]

If you have a larger wire (4 or 6 Gage ) for the positive cable try that. Some of the tractor manufacturers used wire that was too small ( creating to much resistance ) which we have solved by installing larger wires.

 

[jvarvil]

I hooked jumper cables directly to the starter with good car battery. It still did not turn over.

 

[twinfords]

tells me that your starter is bad. you said it cranked with bigger starter. get one and see if that fixes things.