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I need to expose more shaft to put a split coupling on and am installing the stud type packing assembly also. Question. How close can i cut the rubber tube between the packing assembly and hull. i have about 4in.inbetween now. I dont have the engines in this boat is being repowered.31Tiara I guess i could buy longer shafts and just install the engines a little foward, but i would rather not. HELP GURUS !!!!!

I don't know what the official ratio is, but I have a boat with a very tight engine installation and the hose is so short that the brass pieces are about 1/2" apart. It's a 1 3/8" set up. I have had zero problems in 5 years, doesn't seem to have any impact on the packing system.

I will say that from the strut to trans flange, including the thru-hull/shaft log fitting is dead-on and were very accurately centered when I built it. I had a split bushing machined to fit around the shaft to center the shaft log during installation. I would expect that if your alignment is not dead on the additional hose lenght would help compensate for any misalignment.

Thanks for the advice. Info like that is invaluable. Nothing like getting real life info !!! Thanks TROY 31TIARA "DRIFTER"