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Finished rebuilding the engine for the Porter Cable tractor.

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#1 classic OFFLINE  

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Posted November 24, 2017 - 04:14 PM

Salvaged from the dump and getting restored now. First of all, the electric start and charging system on this Briggs 143307 is odd. I've cleaned and tested the starter and that works great. I had to solder a wire back onto one of the fuse holders and solder a disconnected rectifier wire back onto the alternator. Hopefully the charging system works when I get the engine installed and wired up. The engine itself was in pretty sad shape, mechanically. The connecting rod bolts were loose and the rod and crankshaft were wiped out. I had to hone the engine .010, cut the valve seats, and install an intake valve guide insert. Water got to the points and condenser and corroded them badly. Here's a list of what I replaced with new parts.
Piston, Pin, clips, and rings.
connecting rod assembly.
crankshaft and crankshaft gear.
Gaskets and crankshaft seals.
Carburetor top half and carb rebuild kit.
Fuel sediment glass bowl, screen, yoke, and gasket.
Fuel line.
Crankcase vent tube.
Carb throttle control assembly and spring.
Governor air vane assembly
Camshaft, tappets, valves, valve springs, and valve spring retainers.
Three leg armature(coil) assembly.
Points, condenser, points plunger, and points cover.
Exhaust elbow, lock nut, and muffler.
Gas tank cap.

The gas tank was clean and dent free, so I was able to use the tank and straps. I put fresh oil in the engine today and it started after a couple of pulls. I adjusted the carburetor and let the engine run for about 15 minutes. I dumped the oil and filled the crankcase with fresh oil. The engine runs really good and I didn't see any fuel or oil leaks. I just have to retorque the hardware and it's ready for paint and decals. Now it's on to the rest of the tractor. While picking up some parts at a friends house, we got talking about Porter Cable and Motor Mower garden tractors. He went and got a dealers service manual for Motor Mower and Lawnmaster equipment that he had in the back. He told me to make him an offer on it, so I did, and it came home with me. There's lots of great info on tractors and attachments in this book. Dates on the pages range from 12/61 to somewhere in 1966. If anyone needs info, or pics from this book, just let me know. There are schematics for tractors, attachments, and other Motor Mower/Lawnmaster equipment.

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Edited by classic, November 24, 2017 - 04:15 PM.

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Posted November 24, 2017 - 04:21 PM

Yeah man Jim, she's going to be a beauty.
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#3 classic OFFLINE  

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Posted November 24, 2017 - 04:28 PM

Thanks Hank, lots of work ahead of me yet! Just glad the engine is out of the way and running smooth. These little Briggs engines do vibrate a bit, so I guess that's why they put the vibration dampeners beneath the motor mounts on these tractors.
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#4 KennyP ONLINE  



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Posted November 24, 2017 - 04:52 PM

Glad you have it's heart functioning properly!

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#5 lrhredjb OFFLINE  



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Posted December 31, 2017 - 11:12 PM

That looks like a B&S 23 series engine.

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#6 classic OFFLINE  

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Posted January 01, 2018 - 12:48 AM

The 143307 Briggs is a sleeved cylinder, aluminum block engine. It has the same carburetor bottom half of a Briggs 23 series, and the same 3 leg armature coil as the 19D and 23D Briggs engines. It's only 14 cubic inches, so it's quite a bit smaller than the 23 series.
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