How to fix this sound - Briggs 500e series engine lawn mower
Blade bolt can be tight but if keyway is worn the blade can still rock, I have seen it.
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- Sep 7, 2024
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That appears to be a worn-out crank journal in the top of the block. This thing has been run a long time with a lack of oil. The crank should NOT move up and down or side to side like you show in the video.
One (long shot) exception that I can think of is if someone has replaced the oil sump gasket with thicker material than the stock gasket. DIY types can be creative.... LOL
Other than that, there is no (economical) rebuilding to correct this kind of damage.
kikoman7
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- Apr 10, 2025
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Hi guys! I really appreciate all your replies!!
In the meantime, I have mostly taken the engine apart. Here are some pictures and a video:
drive.google.com
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The connecting rod ring has a lot of damage (it has 1 relatively large hole in it). Also, it appears that the piston rings have expanded upon disassembly. Finally, I saw that the blade adapter might have some damage (but I am not sure about this). What do you guys think? I can always take some additional photos or videos if that can help.
Thanks again for your replies!!!
In the meantime, I have mostly taken the engine apart. Here are some pictures and a video:
20250502_183413.jpg
drive.google.com
20250502_182322.jpg
drive.google.com
20250429_184058.jpg
drive.google.com
20250430_115559.jpg
drive.google.com
WhatsApp Video 2025-05-02 at 21.17.42.mp4
drive.google.com
The connecting rod ring has a lot of damage (it has 1 relatively large hole in it). Also, it appears that the piston rings have expanded upon disassembly. Finally, I saw that the blade adapter might have some damage (but I am not sure about this). What do you guys think? I can always take some additional photos or videos if that can help.
Thanks again for your replies!!!
- Joined
- Sep 7, 2024
- Threads
- 3
- Messages
- 312
Picture #1 of the piston shows the damage. Part of the oil ring area is missing. It could be from weak/ defective casting or a problem with fuel in the oil at some point creating a condition known as "low speed detonation".Hi guys! I really appreciate all your replies!!
In the meantime, I have mostly taken the engine apart. Here are some pictures and a video:
20250502_183413.jpg
20250502_182322.jpg
20250429_184058.jpg
20250430_115559.jpg
WhatsApp Video 2025-05-02 at 21.17.42.mp4
The connecting rod ring has a lot of damage (it has 1 relatively large hole in it). Also, it appears that the piston rings have expanded upon disassembly. Finally, I saw that the blade adapter might have some damage (but I am not sure about this). What do you guys think? I can always take some additional photos or videos if that can help.
Thanks again for your replies!!!
It is normal for the rings to expand slightly when the piston is removed from the cylinder. They have tension on them to prevent oil leaking through and maintain compression so the engine can combust the fuel/air mixture.
I recommend you look for a replacement engine