Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Clutch bolt

  1. #1
    Junior Member
    Join Date
    Dec 2010
    Location
    NY
    Posts
    12

    Clutch bolt

    Hello all, I have a tecumseh engine, H35 45281h, it is a 3.5 motor from a snowblower. I'm using it on my minibike. I installed a new clutch, 3/4" Hole #35 chain with 12 teeth, and wanted to add the outer bolt that holds on the clutch but can't seem to find one to fit. I was told that the two clutch hex screws one on the keyway and the other that tightens on the shaft is sufficient. Is this true? Also I was told that the shaft may have not been bored. If not is there any way to do it? If it is bored, I would like to add the bolt but none on my bolts at home seem to fit. Is this a special bolt? I searched the net and can't seem to find an answer. Any help would be appreciated.

  2. #2
    you were told it may have not been bored, but you cant find a bolt to fit it. One of these statements are false if you have the engine in front of you. Am I reading this wrong?

  3. #3
    Junior Member
    Join Date
    Dec 2010
    Location
    NY
    Posts
    12
    The shaft does have visible threads, but I'm going by what was told to me. Being that it was from a snowblower and didn't originally have a clutch. It looks like threads are there. I don't know how deep though.

  4. #4
    Senior Member loampey's Avatar
    Join Date
    Mar 2009
    Location
    central Illinois
    Posts
    223
    its most likley a fine thread bolt I can't remember the size.

  5. #5
    Senior Member
    Join Date
    Dec 2009
    Location
    north dakota
    Posts
    2,587
    5/16 by 28tpi? i think it is its a really fine thread . the 2 set screws will hold a clutch just fine . with the key in there and the screws tight it wont move . i ran mine for years and years no problems just check that there tight every so often .

  6. #6
    if it has threads, it's probably all good. try 5/16-24

  7. #7
    Banned Strigoi's Avatar
    Join Date
    Mar 2008
    Location
    Martinez, CA
    Posts
    9,998
    take the engine to the hardware store with you and find a bolt that fits.

  8. #8
    Junior Member
    Join Date
    Dec 2010
    Location
    NY
    Posts
    12
    Thank You!

  9. #9
    ogygopsis's Avatar
    Join Date
    Jun 2006
    Location
    Central Pennsylvania
    Posts
    1,644
    Vaughn, Most of the time when threads are filled with grease and grime it looks like there is almost no thread left when in fact a good set of threads is still present. Get a spray can of brake cleaner and a brass wire brush; the cylindrical kind that they use to clean the bore of rifles; and go to work on cleaning out the threads in the end of your crankshaft. You can even chuck the brush in a hand drill and spin it slowly while adding a little brake cleaner as you go. If you've got threads left; you'll definitely see them. Then go to the hardware store and get yourself two bolts. A 1/4-28NF, a 5/16-24NF. One of them should thread into the end of your crankshaft. If it threads in easily then you're home free. If it threads in but sticks here and there then you may have to buy a ($3.00) tap of the corresponding size and clean up the threads. After that, mount your clutch, clean out the set screw holes with brake cleaner, add a drop of blue loctite to each and tighten them down, then use the same procedure with the bolt in the end of the shaft and let everything sit overnight. That gives the loctite time to set up. You'll be good to go and should have no problems with the clutch staying on. Good luck. Ogy

  10. #10
    Yellowhand's Avatar
    Join Date
    Jan 2007
    Location
    Beatrice, Nebraska
    Posts
    3,603
    5/16" 24 tpi NF x 1" depth is the common bolt size for 3/4" crankshafts...

    You'll need a fender washer also...or just buy one of these billet retainers from ebay.
    Attached Images Attached Images

Similar Threads

  1. AGK Bolt on Kit
    By Baseballdude2915 in forum Honda / Clone / Predator Engines
    Replies: 9
    Last Post: 01-28-2011, 09:06 PM
  2. Bolt size
    By Busalo in forum Honda / Clone / Predator Engines
    Replies: 5
    Last Post: 01-24-2011, 10:27 PM
  3. crank bolt
    By minibikeneeder in forum Engines and Modifications
    Replies: 19
    Last Post: 12-20-2010, 02:09 PM
  4. Bolt torque
    By robby12 in forum Briggs & Stratton Engines
    Replies: 4
    Last Post: 07-25-2010, 12:36 PM
  5. 6.5 clone clutch bolt
    By bmw12341970 in forum Honda / Clone / Predator Engines
    Replies: 10
    Last Post: 06-17-2008, 11:55 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •