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Small Engine Repair: Checking Fuel Pump Diaphragm & Inlet Needle on a Diaphragm Carburetor

Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.** In this video I show how to check the fuel pump diaphragm and inlet needle for leaks on a diaphragm carburetor. A diaphragm carburetor is used on hand held power equipment, and are popular because they will work in any position. All chainsaws, trimmers and blowers that I have seen use a diaphragm carburetor. To check the fuel pump and inlet needle, pressurize the carburetor to 10 psi through the fuel inlet. The carburetor should hold the pressure fairly steady, and if it doesn't than there is a leak around the fuel pump diaphragm or inlet needle. You can pin point the leak by dunking the carburetor in water while it is pressurized. If the leak is around the fuel pump diaphragm, than either the fuel pump diaphragm, fuel pump diaphragm cover or the body of the carburetor is at fault. If the leak is coming out of the venturi, than the inlet needle or seat is faulty. Tools used: - 3/8" wrench to remove carburetor - Mityvac to pressurize the carburetor - Needle Nose plyers Specifications: - Carburetor should be pressurized to 10psi through the fuel inlet. Never exceed 10psi. Its important to run fuel through the carburetor before testing. A wet carburetor will hold the pressure better than a dry one.


 


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Small Engine Repair: Rebuilding a Diaphragm Carburetor on a Echo SRM-230 Trimmer Part 1 of 3
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.**





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HOW TO - Two Cycle Carburetor Cleaning / Rebuild (Part 1 of 2)
Since this is only an instructional video series I was not going to use any carburetor cleaner. Basically i'm explaining how to check the pump diaphragm, & metering diaphragm as well as how to clean a two cycle carburetor. K10-WAT & K20-WAT rebuild kits are for all WA & WT series Walbro carburetors. Most of the time you can get away with ordering a K10-WAT if you only need to replace the diaphragms. If you need to do a complete rebuild order K20-WAT. There are special tools for checking both Zama, and Walbro carburetor metering levers but I have found that a metal straight edge ruler is just as accurate. WALBRO METERING LEVER TOOL : http://compare.ebay.com/like/110600202910?var=lv<yp=AllFixedPriceItemType s&var=sbar&rvr_id=216029650572&crlp=1_263602_309572&UA=WVF%3F&GUID=9170fef0 12e0a0645631a321ffbb97bc&itemid=110600202910&ff4=263602_309572 ZAMA METERING LEVER TOOL : http://cgi.ebay.com/NEW-ZT-1-Zama-Z-Carburetor-Metering-Lever-Tool-/1106001 90012 This rebuild / cleaning procedure will also apply to carburetors without a purge bulb. I will do a proper video when I have an actual rebuild or cleaning.





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May be a while on the rest, just hang in there, I will eventually work on this again, its just going to take alot of money to get it bored out and sleeved, new valves, new piston/rings, new rod, everything! i found an old 5 horsepower briggs and stratton engine block with a thrown rod, seized piston and valves. In this video i unseize the piston and valves, and remove them. And begin the clean up process. Cylinder might have to bored. Also note, i said on the video that i may need a new piston because of the stuck rings, not necessarily true, because the rings should come off with no problem. Unless the piston is scored or worn, it shouldn't need replaced. Thanks for watching, and please subscribe!





Small Engine Repair: Using a Harbor Freight Leak-Down Tester on a Briggs & Stratton Engine
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.** This video is about how to use a Harbor Freight Leak-Down Tester on a small engine. I wasn't able to get the tester to work correctly using the instructions provided with the tester, so I made one change, and the tester seems to work correctly. The instructions say to connect the tester to the engine before you apply compressed air and adjust the regulator, but it didn't seem to work correctly, so I applied the compressed and adjusted the regulator before connecting the tester to the engine. This correction made the difference, and I was able to use the tester to determine the condition of the engine. It would be interesting to hear about other experiences with this tester, so please leave a comment, and thanks for watching.





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Small Engine Repair: Adjusting the low speed carburetor circuit on a Ryobi Blower
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.** This video is about adjusting the low speed carburetor circuit on a Ryobi Blower. On this particular blower the low speed carburetor circuit was adjusted to lean, so the blower would stall when you tried to accelerate the blower from idle to full rpm. The low and high speed adjusting screws on this Ryobi blower use adjusting screws commonly referred to as pac-man screws. Adjusting tools can be found on ebay. Tools Used: - Pac-man tool driver





Small Engine Repair: Inspecting the Drive System on a Scotts Self Propelled Walk Behind Lawn Mower
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.** In this video I inspect the drive system on a Scotts self propelled walk behind lawn mower. Scotts does not manufacture their mowers, and the mower shown in the video is actually manufactured by Murray. Scotts also has John Deere manufacture mowers under the Scotts label. The self propelled wheels on this mower are actually plastic ring gears with tire tread, and the most common problem you will find with this type of system is the metal axle gear has a tendency to wear down the plastic ring gear, and cause the two gears to slip. It is an easy fix, and each wheel only requires removal of one nut and washer to remove the worn wheel and replace it with a new ones.





Small Engine Repair: Rebuilding a Diaphragm Carburetor on a Echo SRM-230 Trimmer Part 2 of 3
Visit http://www.thesmallengineshop.net **Always follow the instructions in your repair manual when doing repair or maintenance work on Outdoor Power Equipment. Manuals can be found at the manufacturers website.**





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