Recent content by Preston

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    cracked block

    I have a GM 4-cylinder that has been cracked on the inside of the block as well as the outside.<br />I have taken time to die-grind the cracks down and now I ma in question as to how to repair??<br />Anybody out there have any ideas?? J.B. weld or can I actuall weld these cracks up with a good...
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    Carbs on Merc

    Thanks Hooty-- I hope that it makes a difference, I went to a step hotter plug (actuall 2 steps) to eliminate the fowling. It ran great, it just worried me that I might have too high of heat upon detination. I kept checking cyl. head temps at the spark plugs with a non-contact (infared)...
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    78' mercury mariner carbs- - jets??

    Can anyone give me a sight where I might locate the main jets for this particular motor: 78 merc model 1400, 140 H.P. ? I currently have .0785 maines and would like to drop to a .077 or .076. she is running too rich at 4200 feet altitude. Any help would be appreciated. Thanks I-Boats...
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    Mercury Mariner serial 4867829- need yr and info

    anybody that can help find the year and possibly a "thorough" shop manuel. I would also be curious about the weight of this particular motor as well. Serial 4867829, model 1400 140HP. Thanks for all input and assistance from this sight.
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    MERCURY OVERHAUL???

    I am curious if anyone has ever rebuilt the top end of a Mercury model 1500, 1978, 150hp??? My neighbor has one that he had apparently fired up on the lawn without a fake lake--well rest of story is probably concievable. With no H2O pump to cool, the engine ran for only a short distance after...
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    Mercury mariner burns too rich

    I currently am running a Mercury Mariner model 1400, 140 h.p., 1978 vintage. My problem is that with the stock plugs my engine will load up and foul the plugs. I have changed from the stock plugs to a step hotter and have checked the burn on top of each piston. Each appears to have a...
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