Shaft Alignment: Alignment causes mount problems - SailNet Community

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Old 11-22-2013
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Shaft Alignment: Alignment causes mount problems

In order to achieve good alignment on my Beta Engine and shaft, the flexible engine mount holes are too close to the original holes in the engine bed to provide a good drill and tap solution. My flexible engine mounts provide no elongated bolt hole slots so there is no adjustment built into them. Has anyone else encountered this problem and is there another solution other than buying new engine mounts that have slotted holes?
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Old 11-22-2013
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Re: Shaft Alignment: Alignment causes mount problems

Assuming you have FRP bunks, i would think that you could glass in the old holes, fair the surface and drill new holes
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Old 11-22-2013
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Re: Shaft Alignment: Alignment causes mount problems

A. Fill exsisting holes with epoxy (or appropriate filler) ?
B. Move everything forward or back an inch, would prop still be spaced right ? Maybe a shaft length change ?
C. maybe a spacer to move engine and trans forward a bit?
Just throwing some ideas here, you probably don't need much movement right ?
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Old 11-22-2013
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Re: Shaft Alignment: Alignment causes mount problems

Can you create slots in your new mounts with a round file?
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Old 11-22-2013
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Re: Shaft Alignment: Alignment causes mount problems

I'm with Faster on this. Also if it would be to much to file, a machine shop could elongate the holes and also if need be make a thick washer to help beef up the elongated hole .

Last edited by Markwesti; 11-22-2013 at 08:23 PM.
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Re: Shaft Alignment: Alignment causes mount problems

Thanks for the replies. My mounts do not have much usable base to elongate the holes. I thought maybe welding a wider base on the existing to make a wider base in order to elongate the holes. Does anyone see a problem with doing this?
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Old 11-22-2013
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Re: Shaft Alignment: Alignment causes mount problems

When I replaced my engine, I took out the old mounts, drilled the mount holes with a drill the size of a wood dowel I picked up from a hardware store. Epoxied in the dowls, then drilled the holes for the new mounts. I also had a new shaft made to make sure the prop was at the correct distance aft with proper clearance so the cutlass had water lube to it.

Greg

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Old 11-23-2013
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Re: Shaft Alignment: Alignment causes mount problems

Im with Greg on this...overdrill old hole and epoxy in a dowel...use new mounts as designed...drill and tap where you need them.
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Re: Shaft Alignment: Alignment causes mount problems

Fisheries Supply has slotted mounts at a reasonable price. You might want to check them out.
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Re: Shaft Alignment: Alignment causes mount problems

Our (molded) engine beds have a steel plate embedded under the glass to accept the mount bolts.. the drill and dowel trick wouldn't work and a 'slightly offset' hole would be tough to deal with.

Now I'm wondering if there's enough 'room' vis a vis the prop/cutlass/rudder etc to shift the shaft & coupling forward or aft enough to avoid the existing holes and use the mounts as is..? Might need to relocate a shaft zinc or two..
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