SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: JimmyMc1904 on May 09, 2014, 10:42:56 AM
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Hey everyone. Getting ready to install my 454 BBC after installing new stringers, floor and new paint. Of course going to have to drill new mounting holes for a 4 point system. Any advice on properly doing this would be much appreciated. Alignment, leveling, drilling techniques? Also, mounting hardware used with new 2 X 6 stringers? Pics of the new stringers attached...thanks in advance!!!
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I'm know expert, but I'm sure some will chime in. My advice is to have some good help. You want a slight angle in the driveline between 1.5-4 degrees. And you want that angle to be up and down not left and right. And also whatever you need to do to drill the holes as straight as possible through the stringers and use washer. Also I recommend clear coating or waxing your bolts and nuts after the installed for extra rust protection.
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the motor and pump shaft need to be set to the same angle. but one either higher or lower than the other so that you have a slight 1-2* angle in your driveline.
what i did in mine was measure how much room you need between the pump and motor with the driveline. you dont want the thing jammed onto the shaft all the way either, leave yourself a good 1/2" or so of room. then i took a piece of 2' pvc pipe and stuck it onto the pump shaft. i took a angle gauge and measured the pump shaft angle. then i lifted the motor into the boat and adjusted it (one of those tilting motor hoist things comes in SUPER handy here) so that the motor was at the same angle as the pump shaft. i used my valve covers since they were flat and double checked with my intake manifold (some intake manifolds have angled carb seats... if so find something else flat with teh crank) with the carb off. then to get the angle in the driveline i moved my motor down and used the angle gauge so there was like a 1-2* angle in the driveline. depending on your boat and your pan you might have to move the motor upwards. make sure you leave yourself some room to get the pan bolt out and so that the pan isnt hitting the bilge. then once its all hanging there in the right spots i drilled and put my rear mount bolts thru the stringer. then triple checked my motor angle and drilled and mounted my front mount bolts. do yourself a favor and get some stringer washers to spread the load so you dont crush your stringers. as far as hardware use stainless bolts with nylock nuts. steel rusts and gets ugly and you dont want ugly in your stringers. you can also put a dab of silicone around the washer to keep any moisture out of your stringer too.
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fshopping.rexmar.com%2FMerchant2%2Fgraphics%2F00000001%2F377211.jpg&hash=2e4aedb7dc0a1ca3458c8dcd22b8766afcb25795)
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Thanks so much...I appreciate the help
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