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  1. C

    Merc 40 HP wont start

    I have recently rebuilt the powerhead of a early 70's Mercury 40HP (had water seeping through the exhaust plate). Anyway its all put back together now and won't start. I have taken out spark plugs and tested the spark - very weak and erratic. Carby was rebuilt recently - there is fresh fuel...
  2. C

    Merc 40HP wont start

    I have recently rebuilt the powerhead of a early 70's Mercury 40HP (had water seeping through the exhaust plate). Anyway its all put back together now and won't start. I have taken out spark plugs and tested the spark - very weak and erratic. Carby was rebuilt recently - there is fresh fuel...
  3. C

    Forward control box diagram wanted

    Hi there, I was wondering if anyone has a diagram or PDF file for the internal layout of a Mercury 40HP (early 70's) forward control box - and also some hints on making adjustments to get full throttle and the gear selection right.<br /><br />I have just bought this boat and I think the previous...
  4. C

    Forward control box diagram wanted

    Hi there, I was wondering if anyone has a diagram or PDF file for the internal layout of a Mercury 40HP (early 70's) forward control box - and also some hints on making adjustments to get full throttle and the gear selection right.<br /><br />I have just bought this boat and I think the previous...
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    Throttle linkage at Motor end?

    Hi, I have a red band 40 HP Mercury (approx mid 70's I think)<br />the motor will start and idle very roughly. When you put it into forward gear and try and accelerate the motor just dies. I have had a look at the carby & stripped it down - all ok. There doesn't seem to be any response at the...
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    40 hp Merc engine dies as throttle is put on

    Hi, I have a red band 40 HP Mercury (approx mid 70's I think)<br />the motor will start and idle very roughly. When you put it into forward gear and try and accelerate the motor just dies. I have had a look at the carby & stripped it down - all ok. There doesn't seem to be any response at the...
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