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StevieZ
04-30-2008, 02:02 PM
I Have a Exmark metro 36, with a fb460c Kawasaki. New carb, NGK plug with good spark, I get some back fire through the carb, I've had it running and runs great, just hard to pull start, many pulls! I'm trying to find a service manual, and I'm thinking about grinding the valves and seats. Any input is welcome.

Restrorob
04-30-2008, 08:37 PM
Steve,

Backfiring through the carb is a good sign of a non-seating intake valve, A leak-down test would verify this.

Here is the valve service procedures;

http://i107.photobucket.com/albums/m314/Restrorob/Kawasaki/FB/FB460ValveSeatCutting.jpg


http://i107.photobucket.com/albums/m314/Restrorob/Kawasaki/FB/FB460ValveJob.jpg


http://i107.photobucket.com/albums/m314/Restrorob/Kawasaki/FB/FB460ValveAdjustment.jpg


Also check the valve guides for wear should you open it up.

Good Luck

StevieZ
05-01-2008, 02:17 AM
Thanks for the info, I just ordered a service manual and I hope to pull it apart this weekend. My dealer is 7 weeks behind, I'm hoping the local machine shop can grind the valves and the seats, I can lap them but that's about it.

I'll post an update later.

StevieZ
05-03-2008, 06:41 PM
I pulled the head and found a few of the bolts loose. I will check the head for warpage, The intake valve has a groove worn in it. I'm going to take the valveS and see if they can be refaced. I'm hoping to find a place that can grind the seats in a day or 2 vs the 7 weeks the dealer is behind. I think the auto motive machine shop in town will do it.

I received my service manual today.

I'll keep you posted.

StevieZ
05-06-2008, 12:09 AM
Got the valves refaced and lapped in, they look good, I set the valve clearences. Now I need the gaskets and see how it starts.

StevieZ
05-11-2008, 01:17 PM
Got it put together, and it started on the second pull runs great. Thanks for all the help.

Restrorob
05-11-2008, 03:35 PM
Good Deal Steve....http://www.xtremesystems.org/forums/images/smilies/thumbsup.gif

redmax fan
05-11-2008, 04:25 PM
just in the nick of time with all the rain in the region ,
these lawns are going to be thick this week .

time of year to hustle :walking: