Slightly wobblyLarge Wheel

pull off wheel and check brake pads low,caliper sticking ,or debris -if brakes look good than check hub-wheel bearing----- may be going bad

Check that your front tire size (and width) is not greater than factory recommended. Also check that plastic splash panels under wheel well are not hanging out of position (compare right to left sides). Any recent fender-benders? especially on right front?

If its not the bearing and your Mercury is front wheel drive, it could be the "CV" joints.
It could be both....

Is the wheel rubbing the brake caliper?

Is something like the wheel well liner rubbing the tire(airflow pushing it into tire)?

Jack the tire off the ground and rotate it by hand. Push in & out at the top, sides, and bottom of the tire. Little or no play is considered acceptable. If you get a "clunking" sound and/or a lot of play the bearing(s) are bad. (If front wheel drive, chock rear tires, put transmission in neutral so you can rotate tire.)

Hope this helps.

Hello,
Please check that there is no surface touching the tires of the scooter, second this can be some plastic on top of the wheels, also it could even be a harmless friction sound.
Thanks

As a general rule, it is best to replace the caster as a complete assembly consisting of tire and wheel hub. Usually this is the only way to replace casters when the tire is molded on to the wheel hub. It is the best way to replace the caster since you get a tire, wheel hub and 2 new bearings.
With regard to the drive wheels on a manual wheelchair you can get just a new tire. With a plastic mag wheel and hand-rim you can sometimes get just a replacement snap-on tire to replace the existing.(Snaps on like a rubber band using tire irons). If the hand-rim, wheel, spokes, and bearings are worn or broken, you are usually better off replacing the wheel assembly. With power chairs, it is more cost effective to only replace the drive tires and use the existing wheel rims. Hope this helps.

MaryJain The scooters freewheel lever should be at the right rear of the scooter under the shroud and no it shouldn'd be touching the tire. To put it freewheel you should push the lever down. Now if the lever is rubbing the tire you can try to get someone to push it sideways toward the left tire to get it away from the right tire. It should move easily into and out of gear. Be careful not to break it or the small micro switch on the brake. Hope this helps you

Hard rubber or plastic cap in center to be gently pried off, this will expose a C clip holding the wheel onto a splined shaft. Jack the mower frame up until the tire is off the ground. Remove C clip and then the wheel, being careful keep it, the washers, and the key in order. If you lose the key, which will fall out when you pull the wheel off, axle will not spin the wheel when you put it back together. Note tire can accidentally be put on backwards, so make sure you do not do that or you will rub a groove right through the tire. Mower tires cost more than car tires. Most tire shops can also fix large mower tires.

sounds like a wheel bearing but to be sure jack up the truck and wiggle the tire from top to bottom if it moves then it is a wheel bearing

you did damage to the wheel bearing i bet it sounds like a airplane sound. also if you steering wheel is off 7"then have front end aligned because this will destroy the tires and they will make noise.

you tires may be to big for your truck. turn your wheel and look at them to see if they are rubbing. it my be rubbing on a plastic cover they put on under the wheel wels to keep the water from flying into the vehicle while driving while raining