One potential problem could be that the engine is low on fuel to run properly. If you have made it this far in troubleshooting, the next step is to inspect the engine. If your motor is not intaking water like it should, it can cause the engine to overheat, which can cause issues with the prop. This could be weeds, lines, or other trash. You will need to make sure that the engine is off and look for anything that is blocking the water intake. If your motor is not letting water drain, you have an issue. This can happen just from normal use or even improperly torqued when the boat was at the factory. If you notice bolts and washers missing, or bolts sheared off, you will need to have the transmission and engine alignment checked since there may be a misalignment. Check to see if all of the shaft coupling bolts are still intact and tightened. On the other hand, the propeller shaft being too loose is also an issue. If the prop shaft appears to be stuck or has some resistance, the shaft could be the issue. One simple way to check is to rotate it by hand.
If it happens to be bent or damaged, it can definitely stop the prop from turning. The shaft is powered by the engine and it might have something preventing it from obtaining power. The propeller shaft might be the issue, not the propeller. This is where things can get dicey on issues with your propeller. A simple fishing net or broken lines are enough to stop a prop from spinning. If the prop has come loose or is too tight, this will affect the propeller’s ability to spin properly.įurthermore, make sure there is no debris or something lodged in the prop.
#Inboard boat propeller shafts free
Make sure this is free from debris and see if there is any damage on the inside. If you are able to remove the prop, inspect the inner and outer hub where the prop sits. If the propeller has been damaged or is bent, it will not be able to spin correctly. The propeller itself might be the cause of your problems. Poor quality of gas Look at the Propeller.In addition, some things affect the throttle and could mess with the prop. Some boats act differently if the throttle is not up to a certain amount. Look at the ThrottleĪfter checking the shift lever, try messing with the throttle. If no sound for reverse, then it could be the shifter. If you put it in reverse and can hear it shift, then it might be a coupler issue. However, it’s important to follow manufacturer specifications, and always best to have a marine mechanic inspect for further damages.
In most cases, replacing the propeller hub on the spun prop is an easy job that can be done at home with basic tools.
Contact your boat manufacturer to find out the exact part and size of your outboard engine. To repair a spun prop you will need to remove the propeller, inspect the shaft for any damages, and replace the propeller hub. Do not exceed an idle speed, as this may cause further damage to the prop shaft or engine. If you’ve spun your prop while out on the water, you will most likely have to idle back to the ramp slowly. The engine reaches high RPMs, but the boat can exceed idle speed.Pieces of rubber, or metal shavings coming from the center of the propeller.The prop does not spin in forward or reverse, even when the engine is in gear.Grinding sounds, or erratic noises coming from the propeller.The engine goes into gear and revs loudly, but there is little or no forward motion.This happens when the hub inside the propeller fails, causing the propeller shaft to spin without engaging the prop. The most likely cause of the engine going into gear without any spinning from the prop is a ‘spun prop’. Some troubleshooting tips might require the boat out of the water, such as engine and transmission alignment, inspecting the propeller, and issues with the transmission. So what can you do?Ī handful of steps are required to troubleshoot propeller issues, such as checking the shift lever, throttle, and propeller shaft. Is your boat going in gear but the prop won’t spin? While this is frustrating, it can also be a potentially dangerous situation.
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