n4cer26

Got it running! Sent from my SM-F926U using Tapatalk

Sorry, I forgot to answer that question Mech. Yes, it turned a little easier with the spark plug a little loose. I also realized that during the rebuild, someone put the decompression spri g on wrong and it was holding the wrong side of the metal piece against the dowel. I corrected that. The motor still turned hard. Also discovered that the fuel pump is garbage. I bypassed it and ran directly from tank. I put it back together and hit the starter......it fired right up and idled. Go figure! Took it for a test drive and it has gobs of power. 6x6 works so I'm almost there. I do have an oil leak to chase down. Thanks for hanging with through this......certainly was different! Sent from my SM-F926U using Tapatalk

Ok.......figured out that the spring for the decompression was on so that the opposite side of that metal piece was against the dowel. It shouldn't have made any difference when starting, o ly when running. I corrected it. Also discovered that the fuel pump is not working so it wasn't getting any gas at all. I bypassed it direct to carb. I hit the starter and it fired right up and idled. Took it for a test drive and it runs great. Go figure??! I do have an oil leak somewhere though. Will have to sort that out. Sent from my SM-F926U using Tapatalk

I'm sorry, completely forgot to respond to that question. Yes, it turned over a bit easier with the plug loose. Sent from my SM-F926U using Tapatalk

The engine was rebuilt a couple years ago and I can tell that is true by having gone through as much as I have so far. Looking at the loabes of cam through the rockers....they are pristine. Going to watch the ball bearing today to see if there is any movement in the decompression ball bearing when I that metal piece away from the dowel. I am not sure what the max compression should be.......can't find it anywhere. Sent from my SM-F926U using Tapatalk

Just bought a non-running 425 Magnum 6x6. Guy said previous owner had motor rebuilt (3 years ago or so.) It reportedly ran great but recently the electric start began failing and he put a new recoil on it which he broke immediately. I get it home and put a new recoil on it and the pull is incredibly hard....so much so that I think I'm going to break the new recoil assembly. I also installed a new starter which won't roll it over either. I'm thinking maybe a hydro-locked situation so I pull the plug and the motor rolls over fine with both pull start and electric start. The cylinder was dry however. Checked the valve lash and it was right on at .0006". Checked the compression relief spring on the end of the cam and the spring was strong and keeps the metal piece against the dowel like it should. The cam lobes look good from what I can see. I have a small camera that I dropped into the cylinder. Could t get a pic of the entire chamber because of the angled engine but there are marks on the center piston and a couple of grooves once side of the piston top. I will include the photo. Anyway....I'm at a total loss at this point. Not sure how to proceed and diagnose. Would sure appreciate anyone's help who might know what the heck is going on! I was able to get it to turn over about 5 times with electric start with compression tester installed which read 145 lbs. I don't know what else to do! Reply Sent from my SM-F926U using Tapatalk