Page 3 of 4 FirstFirst 1234 LastLast
Results 27 to 39 of 41
  1. #27
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,596
    Quote Originally Posted by Snapperhead View Post
    115 psi ? Thats aweful low for a 2 cycle engine

    I like to see 150 , 140 is average

    Make sure both plugs are out and throttle is wide open when testing

    You might need to pull that flywheel off and see if the key-way is sheared in half , that will throw off your timing really bad
    The flywheel key is what I was thinking. Mowers are notorious for that if something didn't happen when it was supposed to.

  2. #28
    Join Date
    Feb 2008
    Location
    Altmar, New York, United States
    Posts
    5,160
    Quote Originally Posted by ryan1088 View Post
    The flywheel key is what I was thinking. Mowers are notorious for that if something didn't happen when it was supposed to.
    yes, you are right. but don't you loose spark all together?

  3. #29
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    With the stator not moving you shouldn't have spark. A 2 stroke isn't timed like a 4, there's no Valves. The spark plug just sparks continuously. I really don't remember ever having to deal with timing on a 2 stoke, it just spins and does its job.

  4. #30
    Join Date
    Feb 2008
    Location
    Altmar, New York, United States
    Posts
    5,160
    Quote Originally Posted by Joehvac25 View Post
    With the stator not moving you shouldn't have spark. A 2 stroke isn't timed like a 4, there's no Valves. The spark plug just sparks continuously. I really don't remember ever having to deal with timing on a 2 stoke, it just spins and does its job.
    i think it has a crank cncor and the flywheel has a magnet. when they touch it sparks. i think this is how it works. it seems it has to be timed. if not i think it could spark at the top or bottom of the stroke and possably detonete. right?

  5. #31
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    When the piston hits the bottom there is no compression to make it fire. You may be right I never really got into that area on a 2 stroke

  6. #32
    Join Date
    Feb 2008
    Location
    Altmar, New York, United States
    Posts
    5,160
    i have to go fix the bobcat then i will check the flywheel on the sled. i have zero phone reception up there and no internet. it makes it hard. man, i think i was a better mechanic before i found the internet.lol
    Quote Originally Posted by Joehvac25 View Post
    When the piston hits the bottom there is no compression to make it fire. You may be right I never really got into that area on a 2 stroke

  7. #33
    Join Date
    Jun 2009
    Location
    Upstate SC
    Posts
    1,439
    Quote Originally Posted by snupytcb View Post
    i think it has a crank cncor and the flywheel has a magnet. when they touch it sparks. i think this is how it works. it seems it has to be timed. if not i think it could spark at the top or bottom of the stroke and possably detonete. right?
    If it fired before to early before TDC then the motor would want to spin backwards. Its a timed ignition.

    Sent from my SCH-I510 using Tapatalk 2

  8. #34
    Join Date
    Jun 2009
    Location
    Upstate SC
    Posts
    1,439
    Even with a sheared key it would spark when ever the flywheel passes the stator. There would be enough drag that the flywheel would turn even with a sheared key. The timing might get screwed though. all my two stroke motors had tapered shafts and woodruff keys.

    Sent from my SCH-I510 using Tapatalk 2

  9. #35
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    3,335
    Fyi .... Ether , starting fluid , works great with diesels , but for your gas engine use gasoline and pour couple tablespoons down carb

    This coming from a fella been a mechanic for 25 years and work on both

    Yes that would be me : )

  10. #36
    Join Date
    Feb 2008
    Location
    Altmar, New York, United States
    Posts
    5,160
    Quote Originally Posted by Snapperhead View Post
    Fyi .... Ether , starting fluid , works great with diesels , but for your gas engine use gasoline and pour couple tablespoons down carb

    This coming from a fella been a mechanic for 25 years and work on both

    Yes that would be me : )
    i agree, but it was just for diagnostics. we worked at it for a little while last night. (the fridge git in the way.lol) we found it has a fuel delivery issue also. but i am headed up now, i want to concentrate on the ignition issue.

  11. #37
    Join Date
    Feb 2010
    Location
    butler pa
    Posts
    1,073
    if you have a manual..id check the static timing...spark at wrong time=no firing (assuming fuel system operating )

  12. #38
    Join Date
    Feb 2008
    Location
    Altmar, New York, United States
    Posts
    5,160
    i wish i had a manual.
    Quote Originally Posted by pauls heating & View Post
    if you have a manual..id check the static timing...spark at wrong time=no firing (assuming fuel system operating )

  13. #39
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    3,335
    funny thing with starting fluid .... sometimes it will make starting WORSE on a gas engine

    If you have fuel delivery issues , bypass all that to see if your ignition is ok , lets hear her run a few seconds

    Let that thing air out a few days with no plugs , then pour couple teaspoons fresh gas in the carb

    If you are trying to use gas thats been sitting around 6 months , its no good

    Todays gas with ethanol doesnt like to sit , it turns to worthless crap , it litterally loses its flamability

Page 3 of 4 FirstFirst 1234 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event