BRIGGS & STRATTON 17.5HP BLOWN ENGINE TEARDOWN BROKEN COUNTERWEIGHT BALANCER LINKS GOVERNOR GEAR FIX



Since most of my stuff has been fixed, I decided to teardown the Craftsman LT1500 blown engine and part it out for sale on eBay. I discovered that what I suspected was wrong, as the connecting rod was not broken rather the counterweight balancer links were broken. The governor gear was stripped but the rest of the engine was undamaged. I did use the stator, starter, and carburetor from the engine on the LT1500 rebuild so I had to buy new parts for this. I’m excited because I’ve never had this problem before and I’d like to rebuild it just for my personal experience. At the end of it, if successful, I would have a 17.5hp engine i can use on a future project.

I also received some decals from Lucas Oil and i branded my GT6000 as a Lucad Oil Sponsored machine.

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20 thoughts on “BRIGGS & STRATTON 17.5HP BLOWN ENGINE TEARDOWN BROKEN COUNTERWEIGHT BALANCER LINKS GOVERNOR GEAR FIX

  1. JUST RECENTLY BLEW MY 17.5 BRIGGS AND STRATTON AND THE VIDEO WAS VERY INSTRUCTIONAL. IT WILL HELP ME IN MY TEARING DOWN OF THE ENGINE. COULD YOU MAYBE POST THE REASSEMBLY OF THAT SAME ENGINE. THANKS JEFF WETUMPKA ALABAMA

  2. If you remember when you got that tractor I said the connecting rod could be okay.
    One way you can tell if you have a blown connecting rod look behind the starter 9 times out of 10, when they blow they always crack the block right there.
    A broken balancer is more rare, normally when the balancer does go it blows out the back of the block and the sump.
    When the governor broke that could be what took out the balancer.
    The first part you pulled out that was the camshaft, lol

    Too bad you're not in Canada I have all those parts you need.

  3. Henry that is indeed the compression release assembly and that's what took out your balancer. They are probably the weakest link in a briggs engine other than the the head gasket. If you look at the new cam or have a good used one to look at you can see how poorly designed the ACR is. TINY, THIN. LITTLE wire spring holding it to the cam lobe.

  4. And sometimes I would let my tractor sit for a day or 2and I would just drain it a bit to get some of the dirt it cleans it quite a bit

  5. Appears that the cam is missing the decompression piece at the top…you will need a new cam… thats what it is henry compression release those pieces at the end of your video….NEED NEW CAM.

  6. Rebuild for sure man I'd love to watch you rebuild it. I've never had that problem either and I've rebuilt a few of those, may of had another issue that caused that outcome, great vid!

  7. I never sell my parts, I brought a whole 6.5hp Kohler with me today and glad I did, I needed a few parts off of it to fix another mower,…… That's the compression release valve and assembly, you need to order the whole cam shaft, they can't be fixed….. You might be able to find a used cam shaft but trust me buy new.

  8. I've used Lucas oil products in my shop for years, they make good stuff, I think the counter balance and the rods that connect it to the crank shaft are one piece, but don't quote me on that, but I have never seen one go, and not take the connecting rod out with it….. Lucky man…. Lol

  9. With regards to the compression release and spring that you showed… I did not see the pivot pin that holds the ACR to the camshaft when you pulled the Cam from the block. Chances are if the ACR was not attached to the cam, then the pin is likely broke or worn out. If that is the case you will need an ACR kit for this engine as long as the Cam is still ok.

    You may already have this Manual Henry, if so then it still may help others who need it
    https://www.mymowerparts.com/pdf/Briggs-&-Stratton-Spec-Charts/

    B&S Service Manual 276781 for OHV Engines
    Pg's 136, 137 deals with compression release
    Pg 145 deals with the AVS Balance System

    [The below info is taken from section 10, page 136 of the service Manual]

    Check Camshaft
    1. Check gear (A, Figure 4) for worn or
    damaged teeth. Check lobes (D) and
    journals (B, C) for scratching or scoring.
    Check compression release mechanism
    (A, Figure 5) for wear, burrs, or sticking.
    Replace camshaft if any of these
    conditions are found.

    Also check this short vid on the ACR
    https://youtu.be/hBuUxf8deCM
    Good video as always Henry!

  10. It won't be long and your garage will be so full of free products from your sponsors you won't have enough room to move around much less work on anything.

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