Help designing an engine mount

[micmac]

I've been racking my brain for a while trying to figure an engine mount for the Rotax 503 that's going in my Hustler. Basically there will be four bolts with rubber mounts at the four corners. The engine will mount on a plate that will be bolted to the four corner bolts. Here is where it gets difficult I need the engine to tilt backwards slightly (it's a two stroke an the carbs will be level). I'm trying to figure out how to shim the plate in the front but yet use the bolts are vertical. How can I mate up a vertical bolt with the plate being at a slight angle and not perpendicular.

[jpswift1]

I've been racking my brain for a while trying to figure an engine mount for the Rotax 503 that's going in my Hustler. Basically there will be four bolts with rubber mounts at the four corners. The engine will mount on a plate that will be bolted to the four corner bolts. Here is where it gets difficult I need the engine to tilt backwards slightly (it's a two stroke an the carbs will be level). I'm trying to figure out how to shim the plate in the front but yet use the bolts are vertical. How can I mate up a vertical bolt with the plate being at a slight angle and not perpendicular.

Hey Mike, I'm not sure what degree the angle will be, but you might want to consider using the Recreatives Kohler engine mount pucks for this task and take them to a machine shop to have them mill a slight angle on the top of them. They are round aluminum cones with a slight bit of soft plastic or hard rubber vulcanized onto them to absorb vibrations and they're about 1.5-2" tall.

[6X6]

Mike, for starters, if you can find a shop with a brake, they can put the slight bends into the plate so your bolts mount 90º but you have whatever angle needed for the motor. Machining the bushings will give you the angle on the mounting surface, only thing is the studs will still be vertical and therefore slightly off as will the nuts/washers on the top side, unless those bushings mentioned HAVE a slight angle built in? Personally, I'd bend the top and bottom of the plate, probably path of least resistance.
OTHERWISE, if you weld lower mounts at a slight angle to match that of the plate, and either raise the mount on the higher side or use a longer mount there, that should do it as well, no specialty tools needed, but not as factory as a bent plate.
There's my 2 cents (or Ideas)

[chris davison]

Mc Master carr sells angled washers that are square for bolting thru h beams and channels look in thier on line catalogue.