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    140 and 120 heads interchangeable

    I bought a rebuilt 1975 140 but a valve fell apart for some reason and destroyed the piston and I would think the head as well. I have a head from a 120 if I were to get the piston replaced is it possible to use the 120 head? Thank you for any advice.
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    Carter fuel pump connection

    I am trying to piece together a 70s Mercruiser 140 and got an unused Carter low pressure mechanical fuel pump at a garage sale. It has a marked inlet and outlet plus another port below the marked outlet. I can't find any information on this any where but am assuming it's for a water separator...
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    Which replacement coil for a 70s 140?

    I have a early 60s 120 which I have been using as a guide to piece together a 70s 140. The 120 uses a resistor and a resistor wire which I'm not sure I want to replicate on the 140. I am gathering that I can eliminate the need for the wire and resistor if I use a coil with an internal resistor...
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    Possible 120 coupler problem.

    I have a 1969 120 hp Mercruiser that I have been attempting to bring back to life. I seem to finally have the engine running ok and took it out today to find out what is going to be next on the repair list. I maxed the throttle out and what I heard was a loud quick squeal, momentary loss of...
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    Piston identification question

    I recently acquired two identical 1960s Mercruiser 120 HP engines, on one the pistons are stamped "00" on the other engine the pistons are stamped "30". I am wondering if anyone knows why they would be different?
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    Different sized axle springs?

    A newly acquired boat is slightly too heavy for the trailer. My thoughts are to move the existing axle back and add a new axle on the front. My concern is that if I match the existing axle the suspension would be too stiff and rated for 7000 lbs. - about twice of what I need. If anyone has time...
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    No drain plug?

    I have learned a lot from the forum and I do appreciate the knowledge that you all share however I can't find an answer to a couple of questions that I have. I have a 69 17' Mark Twain fiberglass boat that I am attempting to restore, along with a 65 17' IMP. Both have 120 Mercruisers. The IMP...
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    1971 Evinrude 100 hp correct battery?

    I just put in a new CDI power pack but apparently deep cycle batteries, auto batteries, maintenance free and dry cell batteries can burn the CD module out again, I am wondering if anyone knows what kind of battery can be purchased that would work with this power pack?
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