Hi,
I have a 1975 18' Startcraft with a 1993 Alpha One 3.0 LX Mercruiser engine with an Alpha One outdrive. Yesterday I was cruising along and all of a sudden my outdrive started vibrating really bad. I was able to get back to the dock by going trolling speed. As soon as I accelerate, the vibration starts. I trimmed up the lower unit and there was nothing caught on the prop and it was not bent. The prop shaft was not loose or visibly bent and there doesn't appear to be any visible damage. If I rev the engine in neutral, there is no vibration, so I think I have it narrowed down to the outdrive. I just started my vacation so the thought of pulling the boat to have it sit at a repair shop for weeks saddens me
Any ideas what it could be? I am going to try a prop switch shortly but if that isn't the issue, what might be the likely cause? I had it apart a few weeks ago to do the water pump and I didn't notice any issues then. I greased all the fittings good before she went back together.
Thanks!!
Ron
I have a 1975 18' Startcraft with a 1993 Alpha One 3.0 LX Mercruiser engine with an Alpha One outdrive. Yesterday I was cruising along and all of a sudden my outdrive started vibrating really bad. I was able to get back to the dock by going trolling speed. As soon as I accelerate, the vibration starts. I trimmed up the lower unit and there was nothing caught on the prop and it was not bent. The prop shaft was not loose or visibly bent and there doesn't appear to be any visible damage. If I rev the engine in neutral, there is no vibration, so I think I have it narrowed down to the outdrive. I just started my vacation so the thought of pulling the boat to have it sit at a repair shop for weeks saddens me
Any ideas what it could be? I am going to try a prop switch shortly but if that isn't the issue, what might be the likely cause? I had it apart a few weeks ago to do the water pump and I didn't notice any issues then. I greased all the fittings good before she went back together.
Thanks!!
Ron
