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  1. R

    7.5 hot

    just got a 7.5 mec outboard serial # says a 1969, its been sitting for 6 years and owner said it ran great. got it going but I do not see water coming out anywhere and it seems real hot. Should I not see water coming out some where from the cooling? I have tried the search feature here on 7.5's...
  2. R

    5.7 mercruiser overheat

    It is a 1988 raw water cooled 5.7, it runs at 185 and after 1900 rpm climbs to 200-210 and cools back to 180-85 when I throttle back. First off I changed impeller and housing also confirmed that the t-stat was correct one (140) and replaced. IR gun gave port riser at 94 degrees and starboard at...
  3. R

    5.7 carb angle and cooling

    I have a boat that has had a pair of 5.7 bluewaters dropped into it, it was a basket case. The carbs are on an angle with a wedge causing this so I suspect the boat it came oout of was not a v drive like mine. Will this angle affect the boats performance? If I pull the wedge out it will create...
  4. R

    5.7 compression...too high?

    hello all, I have tried the search function for an answer but have had no joy, I have a trojoan 36' with two mercruiser 5.7 motors, they were made in 1988, hours unknown, carberated, thunderbolt 4 ignition. They have not been started in this boat yet. Ran compression test yesterday and found...
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