My Lawnmower Forum banner

JD 155c Briggs won't start / already adjusted valves

503 Views 3 Replies 2 Participants Last post by  Freddie521
hey guys! checking in again because I've got problems,

JD 155C with briggs 25hp model model 445777 engine,

This is a flood rehab

it's been running great the last few years, an occasional slow cranking that normally I can jumpstart through and get it running,

without the spark plugs in, it spins fast, this weekend I decided to try to adjust them again, this is the third time in about 5 years,

I adjusted the valves to .004 (the manual said .005) at 1/4" past TDC,

it did attempt to spin a revolution or two before stopping but no start or even close to fast enough to start,

Wondering if my cam lobe is shot, I don't see the momentary engagement that is shown on some you tube videos of the rocker dropping for a second, ??

any other advice, not really experienced enough to tear the engine down to confirm the cam lobe,

1 - 2 of 4 Posts
If this mower went thru a flood, you may have repetitive electrical problems. Water in the electrical plus will corrode the terminals. During a off season, you may want to disconnect each connector and clean them.
Like wise with ground points for cables, magnito, starter solinoid and motor.
  • Like
Reactions: 1
1 - 2 of 4 Posts