A WORD ABOUT VIBRATION. Take a long careful crawl under the boat, look at the rudder carefully to see if it is bent. lhg: posted 10-17-2003 07:38 PM ET (US) Usually, a problem with the driveshaft will produce 4 symptoms that alert the driver of an issue that should be addressed. simply apply pressure to the propellers to bend them back into shape. A spun propeller means that the prop hub has spun inside the propeller. If your propeller has any inaccuracies you will be able to tell instantly once it has been measured and the Prop Scan software can guide you through the process of correcting the bent propeller which in … Bill McElroy Well-Known Member. I mangled a SS prop, bent a rudder back a few degrees, and bent the strut at idle hitting my rock on my … Intense Vibrations from Underneath the Vehicle. Shaft deflection, runout, vibration, and axial motion Chapter D4 Page 3 Contact Kalsi Engineering Search this handbook the eccentricity conditions that are … Vibrations problems must be diagnosed … Typically when a wheel hub assembly goes bad it's actually the wheel bearing inside the single assembly that is damaged. 1. I cant find any damage to the prop ruber and am wondering if it could be the lower unit.I got hung up on a sand bar 6 weeks ago.but no trouble until today.if you have a good site for trouble shooting I would greatly be in debt to you.or any help you can offer also. Place your quadcopter on a flat surface and observe the propellers at eye level. Propeller Induced Vibration Propeller induced vibration can be caused by inaccuracies in pitch, camber and section shape. Bent propellers are characterized by loss of lift from one propeller (if concave) or a buzzing sound similar to a mosquito and reduced performance (if convex). One of the first symptoms of a problem with the driveshaft is vibrations coming from underneath the vehicle. These inaccuracies can cause your prop to vibrate. If it's apparent than either the prop, or props are out of balance, or you have a bent prop shaft. Thanks X . thank you in … Listed below are a few of the symptoms that car owners should be aware, that will alert them to a bad or failing wheel hub assembly. 1. Anything over 2k rpm and the boat slowed even more. If it runs true, find a prop shop featuring Hale computer based balancing equipment and … Look at the strut from several angles. Once the hub spins inside of the propeller, the propeller will spin freely and not along with the hub. I have a stanless steel prop.I was on river today & after a while it started to act as it was slipping. Roaring sound coming from the tire / wheel area. Your symptoms don't match my experience with a 120hp Johnson on a 20' Center Console. Prop Scan allows us to see and remove these inaccuracies. Vibration in a driveshaft can be caused by many conditions. The one time I had a spun prop, the boat could not get on plane. A hub can spin inside of a prop due to damage to the hub, damage to the inside diameter of the propeller or incorrect propeller installation. Joined Jul 26, 2000 Messages 10,830 Reaction score 3 … One of the most common cause of driveline vibration are worn U-joints or slip splines, out-of-balance components, yokes out of phase or misaligned angles, approaching critical speed range, and yoke ears that are not concentric with the splines. Remove the prop, or props and use a dial indicator to check the shaft run-out. When I spin the prop manually I hear a little scraping sound not sure if that is normal is there a way to check if the prop shaft is bent? This results in a smoother, more efficient and often faster propeller. 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