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knocking and missing under load


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#1 nickandkalin OFFLINE  

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Posted June 03, 2015 - 12:16 PM

Just wondering what may cause my lgt165 to start missing and knocking after 20-30 mins of operation. i have noticed it lately while im using my scraper blade to level up my yard. i have changed the coil and condenser, also cleaned points.



#2 boyscout862 ONLINE  

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Posted June 03, 2015 - 02:26 PM

Points need cleaning, adjusting and check the timing. Carbon buildup in the cylinders is my second quess. Decarbon with Marvel Mystery Oil in the gas. Good Luck, Rick


  • TomLGT195 said thank you

#3 FilledTires OFFLINE  

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Posted June 03, 2015 - 07:23 PM

I would suggest replacing the points all together and make sure you set the timing correctly. What you're describing is a common symptom of poor timing due to points malfunction.


Edited by FilledTires, June 03, 2015 - 07:37 PM.


#4 EricFromPa ONLINE  

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Posted June 03, 2015 - 08:25 PM

Some will knock if the points are to tight .018 or tighter will make some of them knock a bit.Some old kohlers like tight points and others like them a little loose.Just depends on Cam and Points plunger wear.

 

 

A Lean or fuel starved kohler will also knock and rattle on an engine that needs bored do to excessive cylinder wear.A blown head gasket or Lean running engine will wear the cylinder very very fast.You can tell by eyeballing the gap between the piston and cylinder at the bottom of it's stroke.If you can see the top ring then it's worn out.Some of them get Very Very out of round and can not be bored out big enough to clean it up.Those will have to be bored out and Sleeved.

 

I've bought a couple that were worn to the point of needing sleeved but the PO just stuck a set of cheap rings in them and sold them.A new set of rings will make it run and not smoke for a very short period of time but it won't fix the problem.



#5 Sprint 6 OFFLINE  

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Posted June 05, 2015 - 11:03 AM

Open or closed side?  Closed sides have a fuel pump that will do what you describe when it is on its way out.



#6 nickandkalin OFFLINE  

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Posted June 07, 2015 - 06:35 PM

Sprint 6 it is a closed sided. Tried it out tonight and it started doing it again after about 10 mins of just driving not putting any load on it at all.

#7 nickandkalin OFFLINE  

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Posted June 07, 2015 - 06:37 PM

Thanks for the help guys

#8 nickandkalin OFFLINE  

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Posted June 07, 2015 - 07:24 PM

also just had bowl off carb and gas was still flowing through carb. would this also be due to faulty pump. because i would think that there shouldn't be any gas still running to carb if the pump was good.



#9 nickandkalin OFFLINE  

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Posted June 08, 2015 - 09:21 AM

Just by past fuel pump and only went for about 10 mins and it started acting bad again.😠

#10 Justamccoy OFFLINE  

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Posted June 09, 2015 - 04:33 PM

Check your can I have a lgt 165 that was doing the same thing after it smoked a head I pulled the engine and found that the shaft that runs through the cam had slipped out and was wobbling I'm the block couseing eradic timing

#11 nickandkalin OFFLINE  

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Posted June 09, 2015 - 05:26 PM

justamccoy, is there a way i can check this out without disassembling the engine? 



#12 Justamccoy OFFLINE  

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Posted June 09, 2015 - 05:56 PM

Not really u could take the plate that covers the cam gear and see if it's loose

#13 nickandkalin OFFLINE  

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Posted June 10, 2015 - 07:21 PM

Got the problem solved. New points and condenser. Thanks for all the help guys it was much appreciated.☺

#14 Justamccoy OFFLINE  

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Posted June 10, 2015 - 08:57 PM

Cool glad u got it going have fun

#15 Chopperhed OFFLINE  

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Posted June 12, 2015 - 11:08 PM

Never mind


Edited by Chopperhed, June 12, 2015 - 11:08 PM.





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