Add to prop
Hello Gary,If the motor is not undersized you could possibly increase the vessels powering ability by switching out the current three blade prop. This could be done by switching out the current prop completely or possibly just increasing the current propellers pitch. A propeller is simply a distributor of what power is available from what is driving it. If the propeller does not have enough pitch the motor produces to many Rpm’s. This will cause the boat to seem as if it has little power, which will cause slow speeds. Increase the propellers pitch and the load increases to the motor helping to limit Rpm’s, at the same time driving the boat faster through the water at the same given Rpm. Of coarse this is all predicated on whether the motor has the ability of handling the increased load caused by the additional pitch. It could be that the engine is not producing the power needed to propel it at the speed you are trying to achieve. This lack of power output can be caused by numerous things, including but not limited to, fuel integrity, engine sound ness and additional pulleys and equipment we are forcing the engine to run at the same time we are asking it to push the 10K lb. boat. I would first start by simply increasing the propellers pitch by 1”. See how the vessel and the engine respond. If you experience no problem, it worked. If you experience problems at least you have narrowed out the prop issue. Hope this helps. Kevin