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HELP w/craftsman lawn tractor:no power

969 Views 10 Replies 5 Participants Last post by  gsxr11001990
I have a 4 year old Craftsman lawn tractor, model# 917.289244. It has a 21 HP Briggs, model#331877 type#1371-b1. A month ago, after a no start situation, I diagnosed that the compression release mechanism on the camshaft had failed. I replaced the camshaft. In doing so, I found the pieces to the old one in the sump. most of them were rather small, not much left that was very big! I inspected everything and didn't see any damage from the disintegrated pieces. After putting everything back together, it starts and runs but lacks power. I can put it in gear and it rolls slowly. If I try to engage the blades, it dies. I was wondering if I did something wrong when putting it back together or was there damage I missed. It had enough compression to hold back the starter when there was no compression release. I have spark and I have fuel. I didn't mess with the carb other than to remove it and set it off to the side and then re-install. What am I missing? I guess I'm asking the community what would they look for before throwing their hands up and bringing it to the $shop$! Mower ran well before the no-start issue. It did consume a little oil and I would get some bluish/white smoke when mowing deep wet grass. I figured that was where the oil was going. But I never lost power. Any help would be appreciated. When I do have it running now, I don't have any smoke, but I cant put a load on it, when I do it dies.
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I don't think I put the slinger on wrong. I dropped it in place so the gears meshed on one side and the knob on the other side was up against the lever arm. Sorry don't know what that lever arm is called. I noticed it is activated by the throttle cable on the outside of the motor. Timing marks were lined up and I adjusted the valves to .03 and .05, intake and exhaust respectively, with my feeler gauges. Any other questions? I'm baffled myself. What should I be checking?
so if I increase the load and that linkage doesn't move then I installed the governor/oil slinger incorrectly?
yes I can manually increase speed by moving the feels connected with the engine off.
Thank you everyone for your help. I found the problem. I feel stupid now that I didn't notice it before! But everyone's advice led me to look in in the right spot. The spring connecting the governor arm and throttle was disconnected. Everything running fine now....thanks again for everyone's help!
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