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    Should I swap gear ratios?

    I have been running a 1.62 ratio in my Alpha 1 Gen 2 drive behind my Trophy 2352 with a stock 260 HP 5.7 Mercruiser. I'm building a new engine for it that will be putting out about 300 HP. I've never been able to get the performance or fuel economy that other owners of the same boat say they...
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    Could my Mercruiser actually be a Crusader?

    So I pulled my engine out of the boat this afternoon. As I was turning bolts and removing the intake and heads I discovered that this engine was originally painted the same shade of blue that Crusader paints their engines. The block casting numbers tell me it is a 1991 production year block. The...
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    New cam for 5.7 - am I going too big?

    I'm doing a bit of a freshen up on my 260 HP 5.7, A1G2 drive in my 1999 Trophy 2352. The engine is a 1991 5.7 4V. I bought a pair of 906 Vortec heads and took them to my machinist for a checkup, new SS intake valves, and a 3AVG. In discussing an appropriate cam to complement the new heads, dual...
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    Irregular spark advance Thunderbolt IV

    My early 90's 250 HP 5.7 Mercruiser (carby) with Thunderbolt IV ignition has a slight, but regular miss throughout RPM range. Put the timing light to her, and confirmed a steady 8 degree advance at idle. On the muffs, at operating temp, the engine bogs when I add throttle to her, and there is no...
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    Exhaust Bellows off...

    Hey there! My exhaust bellows has separated from the gimbal on my Alpha 1 Gen 2 drive. It's still connected at the transom shield. I really don't want to take my out drive leg off to reconnect it if I don't have to. do you think I can just pull off the rear clamp and run it like a tube, or maybe...
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