Originally Posted by
Tomo
HI
The 25HP have a accelerator pump kehin carby [remove air cleaner and have a look ]
The butterfly bore is 28mm
The 23hp have a 26mm kehin carb with NO accelerator pump
Early v twins up till about 5 year ago had Nippon denso starter motors [Japanese made ]
Believe it that these were rubbish starters [were intended for smaller engines ]
The later starters are the Taiwan made Delco starter .
As with all small engines mainly b@s vanguard,, kohler etc use a very large battery and at least automotive cables in size for pos and neg . Measure at the solenoid that ur achieving 9.5--10.0during cranking . The small siginal wire to solenoid be at least battery voltage 12v or greater . This wire typically runs thru the ignition switch which causes voltage drop .
Most of the time the starters will grind the teeth on the flywheel and starter bendix then stop working
Grab a file and tidy up the leading edge of the flywheel if this is the case . Beaware that the flywheel teeth can be worn so bad a new flywheel is required .
The very old approx. 2002 and earlier 25hp had ""nikil sil ""cylinder bores These cannot be reconditioned . u need the numbers to check with kohler or find out what was the original machine it was fitted to then approach kohler again .
With the 25 hp kohlers they run hot when only pushed a little """"""""this will destroy them """""
tomo