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  1. Replies
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    Here is the back end of a Tomcat. The prop height...

    Here is the back end of a Tomcat. The prop height is probably too low in this picture, and if I remember it ran better with less setback than this setup. The plywood blocks behind the aluminum plate,...
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    A brass tube has been glued into the pee outlet...

    A brass tube has been glued into the pee outlet with locktite. The indicator tube that goes to the mirror can then be slipped on. Many other motors, like OMC's, already have a hose barb and tube...
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    Several hardware items in this picture. You can...

    Several hardware items in this picture. You can see the steering pulley and a cable guide. A PWC mirror is mounted to the cockpit top edge (mirrors required for all APBA tunnel boat racing classes)....
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    Note the steering coaming pulley up forward,...

    Note the steering coaming pulley up forward, several guides to reduce cable flop, leading aft to a shackle attachment at the steering bar. (I think this is a grand prix?)

    64883
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    The center of the steering cable (3/16" stainless...

    The center of the steering cable (3/16" stainless cable is common?) should have a least 3 turns around a drum. I've used garage door spring/cable drums mounted on a 1" stainless shaft, but any...
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    Here's some typical Sport C hardware, as set up...

    Here's some typical Sport C hardware, as set up on the Tomcats and other similar boats.

    Basic overview. Steering is a pull-pull system with steering bars on the motor. Always use a foot throttle....
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    Looks like your jig will save a lot of time....

    Looks like your jig will save a lot of time. Nothing is more frustrating than driving a twisted boat that won't handle. I've found, besides overall boat shape, the last few feet of the sponson...
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    Some of these are not tomcat pictures, but all...

    Some of these are not tomcat pictures, but all are typical hardware setups on Sport C boats. Official Sport C setups run teh 2 cylinder 40HP Nissan/Tohatsu motors, models M40C, NS40C and NS40C2. I...
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    It so happens I have a mold for the tips. I'll...

    It so happens I have a mold for the tips. I'll lay up an extra set when I'm building a few next month. You don't need them for sport use, but we are required for racing. When racing becomes rubb'n...
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    Here's a couple other tomcat's. On 303 notice the...

    Here's a couple other tomcat's. On 303 notice the tunnel air trap has been extended with aluminum angle in the 1st picture. In the 2nd it has a steering pulley access hatch. Most do not have lift...
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    Here's an old pic, the tunnel ends turn up the...

    Here's an old pic, the tunnel ends turn up the same. I can't tell if the chine is hooked though.

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    The upper pic looks normal. I'm not sure if they...

    The upper pic looks normal. I'm not sure if they did it to dump air, direct spray from the motor, easier to build that way, or some other reason. I don't know about the chine hook. Is it just near...
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    The 2 stripes along the tunnel were probably...

    The 2 stripes along the tunnel were probably small strips 1/2-3/4" tall. Not quite sure how they worked, but I've heard they affected air and water in the tunnel and allowed the motor to be jacked up...
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    They were built light, especially the deck. I...

    They were built light, especially the deck. I rebuilt a friend's for Sport C a few years back. Started in better shape structurally, but the deck was fractured in many places. The deck floated above...
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