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    Venting a prop??

    I have a 1974 70hp Johnson on a 15' Thunderbird tri-hull swinging a 13 1/4 X 18 plain jain stainless prop. WOT rpm's are good and speed is good. All around great performing setup. Any truth to drilling vent holes in the prop and improving holeshot or getting on top performance? Thanks for any advice
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    Tilt & Trim Question

    1974 70hp Johnson that has the tilt assist cylinder. Will a power unit off a another OMC product fit in place? The reason I'm asking is because we have quite a few power tilt & trim units on blown motors at work. I know I have access to two 88hp motors and a few V-6 models. Just wondering if...
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    Odd Tachometer Problems!!!

    I am in the process of restoring a 1974 15' Thunderbird tri-hull, I originally tried a 1998 50hp Evinrude and did not like the performance and have now installed a 1974 70 hp Johnson. With both of these motors and with 2 different tachs they do not act right. With both motors the tach will get...
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