What's the usual go-to tool when it comes to separating a rusty shaft coupler from the engine's output flange? A screw driver and a hammer, right?
Instead, consider a coupling splitter.
Its charm is it avoids side loads on the drive line and NO HAMMERING! It's available to any Afourian for the cost of round trip shipping (compare to the cost of replacing a damaged rear seal or worse). The pictures show it in use on a rusted Yanmar in preparation for an engine swap. After the coupler bolts were removed it took about one minute start to finish.
Instead, consider a coupling splitter.
Its charm is it avoids side loads on the drive line and NO HAMMERING! It's available to any Afourian for the cost of round trip shipping (compare to the cost of replacing a damaged rear seal or worse). The pictures show it in use on a rusted Yanmar in preparation for an engine swap. After the coupler bolts were removed it took about one minute start to finish.
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