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1978 Chris Craft Catalina transmission coupler

dixter46

New member
I just purchased a 78 Chris Craft Catalina with twin 4 cyl engines. The transmission coupler starts backing out the bolts after running about half an hour. Does the coupler need to be replaced if so where can I find this part? Thanks for you time and inputs
 
Are you talking about the bolts that hold the two halves of the coupling together (four bolts throught the flanges, one half on the shaft & one half on the reverse gear), or the bolts that hold the coupling to the prop shaft? If you are talking about the four flange bolts loosening up on their own, I would start with checking the engine alignment.
Rarely should the couplings need replacing.
 
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