In Reply to: Slow cranker posted by Tom on February 04, 2018 at 18:56:58:
Of course you will want to have the battery tested and verify that the battery cables are properly sized and all connections are clean and tight.
Aftermarket starter? Aftermarket starters are not built to the same quality as are OEM starters. Disassembly will indicate that the brush cables are of considerably smaller size. Most likely, the windings are as well.
I too had a slow cranking 9 series tractor with a new aftermarket starter. All else was good. Rebuilding an OEM 6V starter solved my slow cranking problem. My tractor was 6V.
Finally, always depress the clutch and lower the touch control lever completely when cranking.