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Cracked flex plate on airboat

Kenaza24

New member
Joined
May 10, 2025
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3
I've been having some trouble with my airboat recently and discovered that the flex plate seems to be cracked. It's a 2012 model, and I'm not sure if this is a common issue or if it's something I've just run into due to wear and tear. The engine has been making odd noises too, and I've noticed some vibrations that weren't there before. should I just replace it and what's the best way to go about replacing it? the entire flex plate or should I be looking into other components that could be affected by the crack?
 
So cracked flex plates can cause those noises and vibrations, and I think it's best to replace the whole flex plate to be safe and while you're in there, check the torque converter and flywheel for damage too
 
I've been having some trouble with my airboat recently and discovered that the flex plate seems to be cracked. It's a 2012 model, and I'm not sure if this is a common issue or if it's something I've just run into due to wear and tear. The engine has been making odd noises too, and I've noticed some vibrations that weren't there before. should I just replace it and what's the best way to go about replacing it? the entire flex plate or should I be looking into other components that could be affected by the crack?
Whoa man! a cracked flex plate on your airboat is a big deal!
Absolutely, unequivocally, you need to replace it immediately. Do not run the engine again until it's fixed. This is a critical component that connects your engine to your prop/reduction unit, and a crack can lead to catastrophic failure, potentially destroying your engine or transmission, or worse.
 
I've been having some trouble with my airboat recently and discovered that the flex plate seems to be cracked. It's a 2012 model, and I'm not sure if this is a common issue or if it's something I've just run into due to wear and tear. The engine has been making odd noises too, and I've noticed some vibrations that weren't there before. should I just replace it and what's the best way to go about replacing it? the entire flex plate or should I be looking into other components that could be affected by the crack?
You'll definitely need to replace the flex plate itself.
Given the vibrations, it's also a good idea to thoroughly inspect the crankshaft flange and the torque converter or drive hub for any signs of damage or wear!!
Sometimes a cracked flex plate can indicate an underlying issue like improper balancing or excessive vibration elsewhere in the driveline.
Though it's often just a fatigue failure.
Depending on access, replacement generally involves removing the engine or transmission to get to the bellhousing.
It's a fairly involved job, so if you're not comfortable with major engine work, it might be best to have a qualified airboat mechanic handle it!!
 
Hope you had it replaced already! A full replacement is usually the safest but try inspecting components to avoid future problems.
 
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