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So I finally got my winter project done (2002 SAN). Bought the boat with a siezed engine and then installed a new PCM 330 HP Excalibur engine. While doing this I also removed the V-drive and transmission to clean them up. All mounts were placed back in their original position. The boat is running great but now I seem to be chasing a slight vibration. I don't know if the vibration was present before I bought the boat becuase I never had the opportunity to run it.
While I was replacing the engine, I also removed the prop shaft, propeller and other running gear. I had the driveshaft checked and was told it was straight. I had the propeller redone by a very reputible shop, it came back with a perfect data report on balance and performance. I replaced the old strut bushings with Vesconite bushings. When reassembling the boat I realized that I had to lift the driveshaft coupler slightly to get the coupler to engague with the v-drive coupler. Although this may not be optimal, when I look under the boat the shaft is in the middle of the hull opening and the shaft seems to spin freely. My guess is that the lifting required was simply due to the new rubber shaft log I had installed. I also checked the coupler for clearance with a feeler gauge, I found it to be within tolorance.
I notice the vibration the most under hard acceleration, starting from idle. Once the boat is up on plane, I don't notice too much. If you slowley take the boat up on plane I don't feel too much vibration. I also noticed while the boat is in gear idling, the shaft packing nut moves slightly.
My guess is that I am still dealing with a coupler misalignment issue but wanted to get input from the board. Please let me know if you can help. Also, the vdrive mounts on the boat are adjusted way down, I can't lower the vdrive much further so I'm not sure how I could correct this coupler alignment issue.
Thank you
While I was replacing the engine, I also removed the prop shaft, propeller and other running gear. I had the driveshaft checked and was told it was straight. I had the propeller redone by a very reputible shop, it came back with a perfect data report on balance and performance. I replaced the old strut bushings with Vesconite bushings. When reassembling the boat I realized that I had to lift the driveshaft coupler slightly to get the coupler to engague with the v-drive coupler. Although this may not be optimal, when I look under the boat the shaft is in the middle of the hull opening and the shaft seems to spin freely. My guess is that the lifting required was simply due to the new rubber shaft log I had installed. I also checked the coupler for clearance with a feeler gauge, I found it to be within tolorance.
I notice the vibration the most under hard acceleration, starting from idle. Once the boat is up on plane, I don't notice too much. If you slowley take the boat up on plane I don't feel too much vibration. I also noticed while the boat is in gear idling, the shaft packing nut moves slightly.
My guess is that I am still dealing with a coupler misalignment issue but wanted to get input from the board. Please let me know if you can help. Also, the vdrive mounts on the boat are adjusted way down, I can't lower the vdrive much further so I'm not sure how I could correct this coupler alignment issue.
Thank you
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