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Re: [Shop-talk] M*th%&$#c<ing small engines d*mn again

To: Scott Hall <scott.hall.personal@gmail.com>, shop-talk@autox.team.net
Subject: Re: [Shop-talk] M*th%&$#c<ing small engines d*mn again
From: Donald H Locker <dhlocker@comcast.net>
Date: Sun, 9 Aug 2020 05:29:24 -0400
Autocrypt: addr=dhlocker@comcast.net; keydata= xjMEXwcyYhYJKwYBBAHaRw8BAQdAJl7Wv+EBQSrmpiCCgklbnGzSLEUdfb3a70B9YgZYGoPN JkRvbmFsZCBIIExvY2tlciA8ZGhsb2NrZXJAY29tY2FzdC5uZXQ+wq0EExYIAD4WIQSuF6Fu Vueqmk6ZMSVp0J7LiWw/wAUCXwcyYgIbAwUJAeEzgAULCQgHAgYVCgkICwIEFgIDAQIeAQIX gAAhCRBp0J7LiWw/wBYhBK4XoW5W56qaTpkxJWnQnsuJbD/ANogBAOM4leXpc0SVLufNzx7M 2nyHvzajSn2eNvAOqKnl2sI1AP9d3gprathEgJHPjyMsHnBxMUMR8qzEv57eX2iuIjdSBM44 BF8HMmISCisGAQQBl1UBBQEBB0AAyo1LkYQ3hCEI7Ou6nTYLa4b/+xPYkpobAXB4qg0AEQMB CAfClQQYFggAJhYhBK4XoW5W56qaTpkxJWnQnsuJbD/ABQJfBzJiAhsMBQkB4TOAACEJEGnQ nsuJbD/AFiEErhehblbnqppOmTEladCey4lsP8Br4AEA915KAHL9NMdLRKpmJPveRvgc48aJ 57Vc6qSkU8uAttcA/3ocer1Fk6qkydWJh1mWn/zG2BggvzmXGGs/9/BILxcE
Delivered-to: mharc@autox.team.net
Delivered-to: shop-talk@autox.team.net
References: <CAK73_u6PjZiB2gJGH8vJzO=SNVKRJwR0z_A9X57=hv_CbOhqgw@mail.gmail.com> <01df01d66b66$4a31eb30$de95c190$@gmail.com> <CAK73_u6uUuNTGOX+Ds_mpJNg7TcU2oUeUxsxbF=Bd4EP8Kp-ZA@mail.gmail.com> <085800CD-1957-4034-A1A9-61475A6343C6@icloud.com> <CAK73_u6qyXk-+9rF5HjyJPVr_5PpeOMTtY8re6t2rTVA8PLAxA@mail.gmail.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0
<https://cdn.datamanager.arinet.com/image/MTD/d075d134-a7c8-43a8-95d3-3b44c0191f4a/ExtraLarge>
is an exploded parts diagram of the engine. Ignition module (includes
the coil) is #24; flywheel is #23.

More information is through
<https://www.troybilt.com/en_US/service-and-parts#diagrams>
and put in your model number (I picked the first choice for the TB4BP
because I don't know your exact model number) and poke around for the
engine parts.

Small engines are just like large engines, but smaller :-). They tend to
be more finicky because there is only one cylinder and if it gets
flakey, there is no one else to take up the slack.

HTH,
Donald.
--
*Plain Text* email -- it's an accessibility issue
() no proprietary attachments; no html mail
/\ <https://www.georgedillon.com/web/html_email_is_evil.shtml>

On 2020-08-08 9:27 p.m., Scott Hall wrote:
> Update for those of you sadistic-enough to keep reading: the intake
> valve was...loose? Open? The gap was too wide.
> 
> The spec is .003 to .006 intake and exhaust - my smallest feeler is
> .006. I adjusted it to be tight on .006. 
> 
> The hard start is totally fixed. Starts great now.
> 
> Still won't accelerate. Opening the throttle bogs it and it'll die if
> you don't let off. Curing the starting issue seems to have thrown the
> bogging issue into starker relief.
> 
> Exhaust can is clear. Gas is new. Air filter is clean and freshly oiled
> and removing it entirely changes nothing.
> 
> I am unfamiliar with valves making something not run--my experience is
> either on Ford V-8s or a Triumph 1147 I-4, or Honda or Kawasaki SS
> motorcycle engines, none of which ever had issues with the valves. This
> thing's valves are literally just adjusted with a 5/16" nut--there's no
> locking nut. Is it possible that making the intake or exhaust valve
> tighter or looser could cause something like this? Like should I shoot
> for one end of the spec of another?
> 
> Last thing left would be the coil like Tom suggested. There's no mention
> of it in the owners manual and I don't see it in a parts search so far,
> but I started with Amazon. 
> 
> Seriously. I have built--from rusty blocks--a Ford 289 and 390. A
> Triumph 1147 that came in several Tupperware bins. More rebuilds of
> CBR600 and ZX750 engines than I like to think about.
> 
> A leaf blower engine is threatening to best me. I want to back over it
> with the truck just to make it disappear. I think I'm looking for moral
> support here.
> 
> Worn cylinder or piston? Bad valve entirely? I could dig out a
> compression tester, but there's no spec for it in the manual anyway. I'm
> kinda at a loss here.
> 
> On Thu, Aug 6, 2020 at 7:40 PM Tom Coradeschi <tjcora@icloud.com
> <mailto:tjcora@icloud.com>> wrote:
> 
>     I had a leaf blower stop running a few years back due to a bad
>     ignition coil. Have you verified youâ??ve got spark? I donâ??t see that
>     specifically mentioned (yes, you did mention the spark plug)
> 
>     â??
>     Tom Coradeschi
>     tjcora@icloud.com <mailto:tjcora@icloud.com>
> 
> 
>     > On 05 Aug 2020, at 5:09 PM, Scott Hall
>     <scott.hall.personal@gmail.com
>     <mailto:scott.hall.personal@gmail.com>> wrote:
>     >
>     > The carb is getting fuel. I can see it in the fuel lines and it
>     pumps using the primer bulb.
>     >
>     > The symptoms are identical with the old and new carb. I can't see
>     the end of the fuel line but the only remaining fuel issue could be
>     that the new fuel filter (a pumice stone-like thing on the end of
>     the fuel line) could be restrictive. Working against that theory is
>     that it did the same thing with the old fuel filter.
>     >
>     > I don't think the problem is the fuel system. The problem
>     is...what's left? I swapped the spark plug just to do it.
>     >
>     > It's a four-cycle engine. Might the valves (like the intake and
>     exhaust valves in the head) come out of adjustment? This condition
>     has been developing over more than a year...perhaps the valves are
>     slowly coming out of adjustment?
>     >
>     > I don't know what conditions un-adjusted valves cause. I can't
>     think of what else it could be.
>     >
>     > On Wed, Aug 5, 2020 at 3:23 PM <alfuller194@gmail.com
>     <mailto:alfuller194@gmail.com>> wrote:
>     > Can you confirm whether it is actually getting fuel to the carb?
>     Try starting it with ether/carb cleaner/gasoline directly to the carb?
>     >
>     > 
>     >
>     > ----------------
>     >
>     > All the best,
>     >
>     > 
>     >
>     > Al Fuller
>     >
>     > 
>     >
>     > From: Shop-talk <shop-talk-bounces@autox.team.net
>     <mailto:shop-talk-bounces@autox.team.net>> On Behalf Of Scott Hall
>     > Sent: Wednesday, August 5, 2020 4:06 PM
>     > To: Shop-talk@autox.team.net <mailto:Shop-talk@autox.team.net>
>     > Subject: [Shop-talk] M*th%&$#c<ing small engines d*mn again
>     >
>     > 
>     >
>     > Troy Bilt four-stroke backpack leaf blower.
>     >
>     > 
>     >
>     > Replaced the carb and plug.
>     >
>     > 
>     >
>     > No change in symptoms: hard start, choke useless, engine bogs on
>     application of throttle.
>     >
>     > 
>     >
>     > That sounds like fuel/air to me. That's the carb. The carb and
>     plug are brand new. The old carb and plug look fine and it's doing
>     the same thing. The carb isn't the problem.
>     >
>     > 
>     >
>     > I am literally out of ideas. Any idea what to look at next before
>     I just toss it?
>     >
>     > 
>     >
>     > Thanks and (*&^*&%&#()_#@&*$&#^&^%.
>     >
>     > 
>     >
>     > Scott
>     >
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