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  1. #1
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    200 gearcase casting numbers

    Hi all. . . . while back there was a nice chart telling all the casting numbers for the 200 gearcases and what were big bearing and what were not. . . any ideas where it was? We all know it's 1647-9147, but what the C, C1, C4, etc, and no C all mean. . . thanks for any tips to the lead. . .

  2. #2
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    1647 9147 plain ,C, C1 were big bearing C2,C3,C4 are non ratchet small bearing cases and there is no specific empty case just for the 200 its determined what is built in it , just like the early model merc empty blocks 95 down to 91 the exhaust cavity is the same on 150, 175, 200 blocks it is determined by what sleeves are installed after that the ff block became the 200 and bb block still had small exhaust cavity it was 135 150 175 sleeves are what changes h/power

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  4. #3
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    Quote Originally Posted by TEXAS20225 View Post
    1647 9147 plain ,C, C1 were big bearing C2,C3,C4 are non ratchet small bearing cases and there is no specific empty case just for the 200 its determined what is built in it , just like the early model merc empty blocks 95 down to 91 the exhaust cavity is the same on 150, 175, 200 blocks it is determined by what sleeves are installed after that the ff block became the 200 and bb block still had small exhaust cavity it was 135 150 175 sleeves are what changes h/power
    awesome, exactly the info I needed, greatly appreciated, thanks!!

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    you are welcome

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