Its not Guardian Industries. Its made by Marine Design Corporation. A fellow boater got tired of blowing up drives and transmissions and decided to come up with a solution. He designed it to fit inside a NXT bellhousing and now we`re trying to figure out how to make it fit in a Merc. housing like I have.
DriveGuardianTMDriveGuardian is a patent pending device designed to absorb and dissipate the shock-induced loading of the gear sets and shafts in a marine drive system and eliminate the damage from overloading. DriveGuardian’s design controls the maximum torque seen by the drive with zero impact or adverse effects under normal operation. Importantly, as designed, DriveGuardian’s operation is 100% mechanical, operates automatically, is completely transparent to the boat operator, and requires no additional maintenance.
DriveGuardian replaces the existing coupler or drive-plate that connects the engine to the stern drive’s input shaft or driveline in staggered installations. Installation is straightforward and can be performed by any reputable dealer or experienced boat owner. DriveGuardian is suitable for single and multi-engine installations and is compatible with most stern drives on the market. Figure 2 is an illustration of DriveGuardian for Bravo style drives such as the Mercury Bravo One
I have the entire tech brief if anyone is interested, it entails the testing on Lake Michigan and seeing TQ spikes as high at 1900ft/lbs which explains why he went thru 3 NXT transmissions in the first year on a 42 Fountain and at least 3 upper gear sets on #6 drives after beefing up the transmissions. (high X dimension)
Basically he can custom set the Drive Guardian to slip at a specific tq. So those Drive killing TQ spikes from coming in and out of the water are eliminated. Personally I think its genius idea and after having to send both drives to Florida for rebuilds and losing boating time and breaking the bank, its something I`d like to avoid. After I dyno and see what TQ my motors are making I`d like to set it to 10% above and this way the drive/trans will never see any higher torque than the Drive Guardian is set at.
Flex plate plus D.G. is only a few pounds less than the stock fly wheel.
I have big shaft #4`s heres a few more pics of the SSM version:
Heres the BRAVO version:
He hasn`t broken a drive since installing this on his boat.
You can modify your damper plate to fit or Innovate is in the process of making new ones. Also CP performance will be coming out with a bellhousing that moves the coolers forward to make room so a flexplate does not have to be used and no need for a different starter.