Damper Plate Replacement (Reduces Rattle)
The Rattle
is Gone.
That loud, metallic clatter at idle isn't your engine falling apart. It's a $200 part hidden between your engine and transmission. We replace it to restore the peace.
"Rocks in a Can"
The symptom is unmistakable: a loud, rhythmic clattering sound at low idle that disappears as soon as you rev the engine. It sounds catastrophic, but it's usually just loose springs.
The Shock Absorber
The damper plate (drive plate) uses springs to absorb the shock pulses of the engine firing before they hit the transmission gears. When these springs wear out, the plate rattles against the flywheel.
Transmission Safety
Replacing a rattling plate isn't just about noise. A broken spring can fall out and lock up the flywheel or damage the starter. Changing it now prevents transmission damage.
Deep Access Repair.
A simple part that requires major access.
Split Drivetrain
We unbolt and slide back the transmission (or remove the stern drive leg) to expose the bell housing area.
Remove Plate
We unbolt the old damper plate from the flywheel. This is where we usually find broken springs or loose hubs.
Install Upgrade
We install a new Heavy Duty or High Deflection plate (like R&D Marine) designed to dampen vibration better than stock.
Realign
Crucial step: We reinstall the transmission and laser align the mounts to ensure the input shaft enters perfectly straight.
Quiet Confidence.
Return to a smooth, silent idle.
Component Options.
We use the industry's best damping technology.
Common Questions
Is my engine blown?
Probably not. If the noise goes away when you increase RPMs above 1000, it's almost certainly the damper plate springs rattling, not a rod knock.
Why is the labor high?
The part is inexpensive ($150-$300), but accessing it requires separating the engine from the transmission. This often involves moving the engine forward or removing the drive entirely.