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If the valves have tighened up, which is normal as things wear, they =
won't be sealing and you won't have enough compression to light off the =
charge, or when it does light off it's leaking out instead of making =
power. Is there an adjustment available on this engine? I don't know =
tiiny 4 strokes at all. I would think they'd build it with more =
clearance than woul devery be used up by wesr. Can you do a compression =
test on the cylinder? Leakdown test? Does it feel easier to start =
(assuming a pull start) than when it was new? A leaky valve would make =
it feel easier - the more leaky the easier it would be.
You checked the spark plug wire for cracks? Can you try it in the dark =
and see if the spark leaks out of the wire anywhere?
jim
> On Aug 5, 2020, at 5:09 PM, Scott Hall <scott.hall.personal@gmail.com> =
wrote:
>=20
> The carb is getting fuel. I can see it in the fuel lines and it pumps =
using the primer bulb.=20
>=20
> 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.=20
>=20
> 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.=20
>=20
> 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?
>=20
> I don't know what conditions un-adjusted valves cause. I can't think =
of what else it could be.
>=20
> On Wed, Aug 5, 2020 at 3:23 PM <alfuller194@gmail.com =
> Can you confirm whether it is actually getting fuel to the carb? Try =
starting it with ether/carb cleaner/gasoline directly to the carb?
>=20
> =20
>=20
> ----------------
>=20
> All the best,
>=20
> =20
>=20
> Al Fuller
>=20
> =20
>=20
> From: Shop-talk <shop-talk-bounces@autox.team.net =
> Sent: Wednesday, August 5, 2020 4:06 PM
> Subject: [Shop-talk] M*th%&$#c<ing small engines d*mn again
>=20
> =20
>=20
> Troy Bilt four-stroke backpack leaf blower.
>=20
> =20
>=20
> Replaced the carb and plug.
>=20
> =20
>=20
> No change in symptoms: hard start, choke useless, engine bogs on =
application of throttle.
>=20
> =20
>=20
> That sounds like fuel/air to me. That's the carb. The carb and plug =
are brand new. The old carb and plug look fine and it's doing the same =
thing. The carb isn't the problem.
>=20
> =20
>=20
> I am literally out of ideas. Any idea what to look at next before I =
just toss it?
>=20
> =20
>=20
> Thanks and (*&^*&%&#()_#@&*$&#^&^%.
>=20
> =20
>=20
> Scott
>=20
> _______________________________________________
>=20
> Shop-talk@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.96
> Archive: http://www.team.net/pipermail/shop-talk =
http://autox.team.net/archive
>=20
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/shop-talk/jamesf@groupwbench.org
>=20
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">If =
the valves have tighened up, which is normal as things wear, they won't =
be sealing and you won't have enough compression to light off the =
charge, or when it does light off it's leaking out instead of making =
power. Is there an adjustment available on this engine? I don't know =
tiiny 4 strokes at all. I would think they'd build it with more =
clearance than woul devery be used up by wesr. Can you do a compression =
test on the cylinder? Leakdown test? Does it feel easier to start =
(assuming a pull start) than when it was new? A leaky valve would make =
it feel easier - the more leaky the easier it would be.<div class=3D""><br=
class=3D""></div><div class=3D"">You checked the spark plug wire for =
cracks? Can you try it in the dark and see if the spark leaks out of the =
wire anywhere?<br class=3D""><div class=3D""><br class=3D""></div><div =
class=3D"">jim<br class=3D""><div><br class=3D""><blockquote type=3D"cite"=
class=3D""><div class=3D"">On Aug 5, 2020, at 5:09 PM, Scott Hall =
<<a href=3D"mailto:scott.hall.personal@gmail.com"; =
class=3D"">scott.hall.personal@gmail.com</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"ltr" =
class=3D"">The carb is getting fuel. I can see it in the fuel lines and =
it pumps using the primer bulb. <div class=3D""><br =
class=3D""></div><div class=3D"">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. </div><div class=3D""><br class=3D""></div><div =
class=3D"">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. </div><div class=3D""><br class=3D""></div><div class=3D"">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?</div><div class=3D""><br class=3D""></div><div =
class=3D"">I don't know what conditions un-adjusted valves cause. I =
can't think of what else it could be.</div></div><br class=3D""><div =
class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Aug =
5, 2020 at 3:23 PM <<a href=3D"mailto:alfuller194@gmail.com"; =
class=3D"">alfuller194@gmail.com</a>> wrote:<br =
class=3D""></div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US" class=3D""><div =
class=3D"gmail-m_6250196434153488190WordSection1"><p =
class=3D"MsoNormal">Can you confirm whether it is actually getting fuel =
to the carb? Try starting it with ether/carb cleaner/gasoline directly =
to the carb?<u class=3D""></u><u class=3D""></u></p><p =
class=3D"MsoNormal"><u class=3D""></u> <u class=3D""></u></p><p =
class=3D"MsoNormal">----------------<u class=3D""></u><u =
class=3D""></u></p><p class=3D"MsoNormal">All the best,<u =
class=3D""></u><u class=3D""></u></p><p class=3D"MsoNormal"><u =
class=3D""></u> <u class=3D""></u></p><p class=3D"MsoNormal">Al =
Fuller<u class=3D""></u><u class=3D""></u></p><p class=3D"MsoNormal"><u =
class=3D""></u> <u class=3D""></u></p><div =
style=3D"border-right:none;border-bottom:none;border-left:none;border-top:=
1pt solid rgb(225,225,225);padding:3pt 0in 0in" class=3D""><p =
class=3D"MsoNormal"><b class=3D"">From:</b> Shop-talk <<a =
href=3D"mailto:shop-talk-bounces@autox.team.net"; target=3D"_blank" =
class=3D"">shop-talk-bounces@autox.team.net</a>> <b class=3D"">On =
Behalf Of </b>Scott Hall<br class=3D""><b class=3D"">Sent:</b> =
Wednesday, August 5, 2020 4:06 PM<br class=3D""><b class=3D"">To:</b> <a =
href=3D"mailto:Shop-talk@autox.team.net"; target=3D"_blank" =
class=3D"">Shop-talk@autox.team.net</a><br class=3D""><b =
class=3D"">Subject:</b> [Shop-talk] M*th%&$#c<ing small engines =
d*mn again<u class=3D""></u><u class=3D""></u></p></div><p =
class=3D"MsoNormal"><u class=3D""></u> <u class=3D""></u></p><div =
class=3D""><p class=3D"MsoNormal">Troy Bilt four-stroke =
backpack leaf blower.<u class=3D""></u><u class=3D""></u></p><div =
class=3D""><p class=3D"MsoNormal"><u class=3D""></u> <u =
class=3D""></u></p></div><div class=3D""><p class=3D"MsoNormal">Replaced =
the carb and plug.<u class=3D""></u><u class=3D""></u></p></div><div =
class=3D""><p class=3D"MsoNormal"><u class=3D""></u> <u =
class=3D""></u></p></div><div class=3D""><p class=3D"MsoNormal">No =
change in symptoms: hard start, choke useless, engine bogs on =
application of throttle.<u class=3D""></u><u class=3D""></u></p></div><div=
class=3D""><p class=3D"MsoNormal"><u class=3D""></u> <u =
class=3D""></u></p></div><div class=3D""><p class=3D"MsoNormal">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.<u class=3D""></u><u class=3D""></u></p></div><div =
class=3D""><p class=3D"MsoNormal"><u class=3D""></u> <u =
class=3D""></u></p></div><div class=3D""><p class=3D"MsoNormal">I am =
literally out of ideas. Any idea what to look at next before I just toss =
it?<u class=3D""></u><u class=3D""></u></p></div><div class=3D""><p =
class=3D"MsoNormal"><u class=3D""></u> <u =
class=3D""></u></p></div><div class=3D""><p class=3D"MsoNormal">Thanks =
and (*&^*&%&#()_#@&*$&#^&^%.<u class=3D""></u><u =
class=3D""></u></p></div><div class=3D""><p class=3D"MsoNormal"><u =
class=3D""></u> <u class=3D""></u></p></div><div class=3D""><p =
class=3D"MsoNormal">Scott<u class=3D""></u><u =
class=3D""></u></p></div></div></div></div></blockquote></div>
_______________________________________________<br class=3D""><br =
class=3D""><a href=3D"mailto:Shop-talk@autox.team.net"; =
class=3D"">Shop-talk@autox.team.net</a><br class=3D"">Donate: =
$12.96<br class=3D"">Archive: =
http://www.team.net/pipermail/shop-talk http://autox.team.net/archive<br =
class=3D""><br class=3D"">Unsubscribe/Manage: =
http://autox.team.net/mailman/options/shop-talk/jamesf@groupwbench.org<br =
class=3D""><br class=3D""></div></blockquote></div><br =
class=3D""></div></div></body></html>=
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Shop-talk@autox.team.net
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive
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