Now you know why it was so cheap?I have no experience with that particular engine, so take this all with a grain of salt -- hopefully someone who knows more will say more.The problem is that there is insufficient clearance for the crank and prop drive. Reasons that I can think of for this happening are because:It's a lemon, and has been wrong from day 1someone changed bearings and put them in wrongsomeone put in the wrong bearingssomeone put them in with crud in the hole which prevents them from seating all the way inthe case is damaged, and it either prevents the bearings from seating or raised a bung or burr in the nose by the prop drivethe prop drive or crank is damaged, allowing the prop drive to go on the crank too farsomeone assembled it with an incorrect shim between prop drive and crank case??Thanks Tim that's about what I was thinking, I ony paid 60 bucks including shipping but I sure hope it's not a lemon.Thanks
Quote from: Tim Wescott on September 09, 2010, 09:09:34 AMNow you know why it was so cheap?I have no experience with that particular engine, so take this all with a grain of salt -- hopefully someone who knows more will say more.The problem is that there is insufficient clearance for the crank and prop drive. Reasons that I can think of for this happening are because:It's a lemon, and has been wrong from day 1someone changed bearings and put them in wrongsomeone put in the wrong bearingssomeone put them in with crud in the hole which prevents them from seating all the way inthe case is damaged, and it either prevents the bearings from seating or raised a bung or burr in the nose by the prop drivethe prop drive or crank is damaged, allowing the prop drive to go on the crank too farsomeone assembled it with an incorrect shim between prop drive and crank case??Thanks Tim that's about what I was thinking, I ony paid 60 bucks including shipping but I sure hope it's not a lemon.ThanksMost of the things with a bearing can be checked quite easilyThe K&B 61 does not use a shim between the collet and bearing.I've come accross a few with the wrong collet which has a sharper taper and does let the thrust bearing go back too far and rub the case.You also mention that you hit the crank to release the thrust washer. Not a good idea as you may have driven the crank back slightly , and that would be enough to cause your problem.It should only be removed with a puller, even a cheap battery terminal puller can be used. Just use something to protect the tip of the shaft
Topic: K&B .61 stiff crank (Read 723 times)