<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>There is a manual for a Troy-Built 4-stroke backpack leaf blower here: <a href="https://www.leafblowersdirect.com/manuals/TB4BPEC_manual.pdf">https://www.leafblowersdirect.com/manuals/TB4BPEC_manual.pdf</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Around page 13 they detail idle speed adjustment, rocker clearance, etc.… Don’t know if it your model, but might be a good place to start.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>----------------<o:p></o:p></p><p class=MsoNormal>All the best,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Al Fuller<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> Shop-talk <shop-talk-bounces@autox.team.net> <b>On Behalf Of </b>Jim Franklin<br><b>Sent:</b> Wednesday, August 5, 2020 5:29 PM<br><b>To:</b> Shop-talk@autox.team.net<br><b>Subject:</b> Re: [Shop-talk] M*th%&$#c<ing small engines d*mn again<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>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.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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?<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>jim<o:p></o:p></p><div><p class=MsoNormal><br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Aug 5, 2020, at 5:09 PM, Scott Hall <<a href="mailto:scott.hall.personal@gmail.com">scott.hall.personal@gmail.com</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>The carb is getting fuel. I can see it in the fuel lines and it pumps using the primer bulb. <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I don't know what conditions un-adjusted valves cause. I can't think of what else it could be.<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Wed, Aug 5, 2020 at 3:23 PM <<a href="mailto:alfuller194@gmail.com">alfuller194@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Can you confirm whether it is actually getting fuel to the carb? Try starting it with ether/carb cleaner/gasoline directly to the carb?<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>----------------<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>All the best,<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Al Fuller<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>From:</b> Shop-talk <<a href="mailto:shop-talk-bounces@autox.team.net" target="_blank">shop-talk-bounces@autox.team.net</a>> <b>On Behalf Of </b>Scott Hall<br><b>Sent:</b> Wednesday, August 5, 2020 4:06 PM<br><b>To:</b> <a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a><br><b>Subject:</b> [Shop-talk] M*th%&$#c<ing small engines d*mn again<o:p></o:p></p></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Troy Bilt four-stroke backpack leaf blower.<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Replaced the carb and plug.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>No change in symptoms: hard start, choke useless, engine bogs on application of throttle.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>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.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I am literally out of ideas. Any idea what to look at next before I just toss it?<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks and (*&^*&%&#()_#@&*$&#^&^%.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Scott<o:p></o:p></p></div></div></div></div></blockquote></div><p class=MsoNormal style='margin-bottom:12.0pt'>_______________________________________________<br><br><a href="mailto:Shop-talk@autox.team.net">Shop-talk@autox.team.net</a><br>Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><br>Suggested annual donation $12.96<br>Archive: <a href="http://www.team.net/pipermail/shop-talk">http://www.team.net/pipermail/shop-talk</a> <a href="http://autox.team.net/archive">http://autox.team.net/archive</a><br><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/shop-talk/jamesf@groupwbench.org">http://autox.team.net/mailman/options/shop-talk/jamesf@groupwbench.org</a><o:p></o:p></p></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>