Better check your prop shaft alignment with the reduction gear because this is the most important measurement when you change the engine mounts!!!!!!!!!!!! You can check this on the coupling between prop shaft and gearbox.
For every job, there is a proper tool. The spare tire jack from your car was definitely the proper tool for this job. I love the ingenuity, which is a must if you are a full time cruiser. Great job on getting the mounts changed out. Ignore the naysayers, you are living the dream many of us are chasing. Great job, James. Cheers!
It is imperative that you go through and do a full alignment of the prop shaft to transmission. It sounds like you have not done it before, and it should be checked every year and after each time that the boat is hauled out of the water. The fact that your old mounts were collapsed, indicated that it was out of alignment before you replaced the mounts. The shaft should be centered on the flange and the difference in the gap from one side of the coupling to the other should not be more that 3-thosants of an inch [0.003"]
You should have undone the prop shaft at the coupling and then re-aligned the shaft with the new mounts. You now run the risk of excessive cutlass bearing wear or worse, shaft log wear.
Good point on checking the engine mounts but my question is; is the prop shaft alignment the same since you measured engine height with the collapsed mounts and then replaced them with the new ones? In other words when was the last time all that was checked?? You will notice any mis-alignment with uneven wear on your cutlass/ shaft bearing... YMMV
Tighten nuts, not bolts. Disconnect your prop-shaft and check/adjust mounts as will probably be necessary. Your transmission and cutlass bearing will suffer if you are misaligned.
Luckily you came to the correct solution to remove the engine mount. Had you decided to cut the bolt how would you get the new mount installed. Stalemate! A friend who was in the Marines Special Forces often commented: Prior planning leads to peak performance. That I have found is good to remember and act on.
Wonder what country Yanmar engine mounts are made. Did you get SB and BB mounts? On some Yanmars the stiffness on either side are different. Just align geabox flange to propshaft flange to 5/100 mm over eight readings, and you are good to go. Unless system is equipped with two off homocinetic joints. Normally we use feeler gauges and clocks. Good luck. Hope no one follows your routine.
Great video. But what are the results with a started engine beyond the obvious broken engine mounts? Quite things down, sight difference, huge difference?
OMG, Please don’t be so naive by thinking your engine “remained” aligned, because after seeing your old mounts, that engine had lost it’s alignment long time ago…. You can’t skip steps on this project.. remove coupling and realign, if you haven’t done this already..
Better check your prop shaft alignment with the reduction gear because this is the most important measurement when you change the engine mounts!!!!!!!!!!!! You can check this on the coupling between prop shaft and gearbox.
For every job, there is a proper tool. The spare tire jack from your car was definitely the proper tool for this job. I love the ingenuity, which is a must if you are a full time cruiser. Great job on getting the mounts changed out. Ignore the naysayers, you are living the dream many of us are chasing. Great job, James. Cheers!
It is imperative that you go through and do a full alignment of the prop shaft to transmission. It sounds like you have not done it before, and it should be checked every year and after each time that the boat is hauled out of the water. The fact that your old mounts were collapsed, indicated that it was out of alignment before you replaced the mounts.
The shaft should be centered on the flange and the difference in the gap from one side of the coupling to the other should not be more that 3-thosants of an inch [0.003"]
What everybody else said, "prop shaft alignment"!!!
You should have undone the prop shaft at the coupling and then re-aligned the shaft with the new mounts. You now run the risk of excessive cutlass bearing wear or worse, shaft log wear.
Good point on checking the engine mounts but my question is; is the prop shaft alignment the same since you measured engine height with the collapsed mounts and then replaced them with the new ones? In other words when was the last time all that was checked?? You will notice any mis-alignment with uneven wear on your cutlass/ shaft bearing... YMMV
I agree exactly with this..post... I think you should separate the prop shaft from the engine and see if it aligns? If not adjust engine to shaft.
At 16:21 there looks to be a earthing wire that is not connected.
Tighten nuts, not bolts. Disconnect your prop-shaft and check/adjust mounts as will probably be necessary. Your transmission and cutlass bearing will suffer if you are misaligned.
Thank you so much for your video. I am very honoured by what you have done for me. Thanks.
That red plus cable on the starboard back will get pinched.
Luckily you came to the correct solution to remove the engine mount. Had you decided to cut the bolt how would you get the new mount installed. Stalemate! A friend who was in the Marines Special Forces often commented: Prior planning leads to peak performance. That I have found is good to remember and act on.
Great work!!! Thank you for this inspiration!!!
How many hours on the original engine mounts? Thank you for video!
Wonder what country Yanmar engine mounts are made. Did you get SB and BB mounts? On some Yanmars the stiffness on either side are different. Just align geabox flange to propshaft flange to 5/100 mm over eight readings, and you are good to go. Unless system is equipped with two off homocinetic joints. Normally we use feeler gauges and clocks. Good luck. Hope no one follows your routine.
Great video. But what are the results with a started engine beyond the obvious broken engine mounts? Quite things down, sight difference, huge difference?
on the second engine mount at front i see a black wire not attached? maybe tape it out of way if not used
Good spot. It’s an unused wire. And yes, we had it secured but need to do it again. 👍
I'm not buying the need to replace engine mounts.
OMG, Please don’t be so naive by thinking your engine “remained” aligned, because after seeing your old mounts, that engine had lost it’s alignment long time ago…. You can’t skip steps on this project.. remove coupling and realign, if you haven’t done this already..