Pietro
Active Member
Actually the engines are Crusader's version of the GM 496 CID truck engine. Great power choice for the boat since they have much more torque at 3200 RPM than the 454 putting out 300 hp at the cruising sweet spot. Max RPM (rev limiter setting) on this version is 4600 but they made an HO version that will spin faster and has a higher cruise RPM. When I put the engines in 13 years ago the prop shop told me that the older AQ 19 shaft was marginal with the ZF 2 to 1 ratio transmissions. The engines are rated to turn as high as 3600 continuously and at that RPM 30 MPH is possible in calm water. I took the boat from Newport News up the Chesapeake Bay/Potomac River to the DC yacht club at this speed in summer of 2013. Eight hour run, approximately 250 miles without refueling.
I reached Sea Ray Customer Service and got the shaft length so now I can get started on the repairs.
Stay tuned......
Remember - BOAT stands for Break Out Another Thousand
Are you going to increase the diameter??? I would suggest to do so