2nd life for engine mounts

[Bren]

hi just wondering if anyone's done and if not what your thought's are.
i am referring to kawi engine mounts, don't know if this would be viable for yami's aswel.
so instead of bolting your bedplate to your mounts. you put a longer bolt (same thread) through your mount from the inside with a large washer in there aswel. so you tighten the bolt so there is 1/2mm of play between bolt head, washer and metal part of mount. (quite loose). then you have a length of thread sticking out of the top of your mount. you then place bed plate on and tighten up with large washer/ lock washer and nut as you would normally. only its a nut instead of a bolt. now, when i've broken engine mounts it's always been the very top metal part coming away from the rubber dampener, so then if/when your mount brake's with this new set up. your engine will still be held in place. directly (though with a bit of play) to the bottom part of the mount. not ideal obviously but enough to get you back to shore? and could this possibly rip the whole mount out of your hull leaving a hole?
i hope you understand what i mean, i can draw up a cross section diagram if know one understands. cheers from down under.

 

[tom21]

the rubber mount is supposed to move to help absorb engine vibration, if you trap the rubber you will transfer that vibration into the inserts in the hull and most likely rip them out. If you ran the bolt in from the top and put a washer and nut welded together it might work to keep the motor from breaking loose and causing major damage if you were upside down.

lot of work- easier to just replace the mounts when they are bad.

 

[Bren]

na the idea is the bolt and washer inside the mount are LOOSE. its only tight between the mount and bedplate. so if the mount brakes, then yes i wld hope you'd feel the vibration and head to shore.

 

[QuickMick]

When the top part of the mount does come off the rubber part, Im still not seeing how the big washer is suppose to catch hold of.

My engine and dry pipe viberate so much its crazy.

 

[tom21]

na the idea is the bolt and washer inside the mount are LOOSE. its only tight between the mount and bedplate. so if the mount brakes, then yes i wld hope you'd feel the vibration and head to shore.

then I misunderstood your question and we are in agreement.

 

[ryan]

y not just replace the mounts every few years? they last forever in a stock boat.

 

[Bren]

well my boat's not stock thus i'm writing this post because of the issues im having braking engine mounts. haven't caused any other damage yet. but im sure its only a matter of time.


so when the mount breaks, the washer holds onto the inside of the mount. where the rubber attaches to the lower metal part of bracket.

 

[zimby]

I know what you mean, a mate of mine has done the same and has been running it for a few months maybe more in a superjet. It does save the engine mounts but also snaps the bolts on inverted landings. So guess it works but the question is how long until u rip and insert out of the hull???

I am always breaking mounts and just folked out heaps of cash fixing parts that were damaged from 4 mounts giving up. So i do understand why u are looking to do this, my advise is land the tricks and keep an eye on your mounts after every ride.

Where do u ride in Aus, i am a gold coast rider

 

[Waternut]

I know what you're talking about and I've seen people do it but only as a temporary fix. I've got 4 kawi 750 mounts if you need some.

 

[fishinrod]

me and a buddy came up with possibly glassing in a to little strap mounts that you could tie a piece of spectra of small rope of some sort to help strap down the motor. Just an idea has anyone tried it?

 

[djkorn1]

I have NEVER blown a kawi mount in 13 years.

 

[Bren]

im down in melbounrne.
and my engine mounts are fine, im just worried they'll break (again) and i'll be out in the surf and do more damage then i would maybe have done otherwise.
cheers guys