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fuel sitting still turns to varnish even in a sealed container. if you use a carbed motor once a week and follow the maintenance schedule, it will run for decades. same goes for EFI motor. if you let them sit. things go awry
first, welcome aboard
nearly all 80's boats have wood in the structure. many boats today still have wood
your boat may have been "overbuilt" when it was new, however it was designed to last 15 years..... and it just past 34.
you should be concerned about the stringers and transom. it is...
your 1992 boat was designed to last 15 years
its now 32 years old
you will find you have wet foam and probably rotting stringers and transom. the floor is the last thing to rot. since you are addressing a soft spot in the floor, your transom, foam and stringers have long ago gotten wet and...
if it isnt a marine diesel with marine manifolds, etc dont even consider it.
if you are talking any of the GM auto diesels from the 70's or 80's, a simple perkins marine diesel will not only be 1/3 the weight, it would be reliable
since the cap is on the expansion tank portion of the heat exchanger. you would never see water moving in it, its not like the top tank of a radiator
you could remove the raw water pump and hook a hose up to the line to the heat exchanger as a test.
did you use a clear piece of hose between...
Without knowing the style of float switch or brand of pump. Only suggestion I have is use a quality pump, a quality switch and a check valve on the discharge
As indicated above. Depends on how much boat in the way. Could be a 20 minute job after pulling the drive, could be a 3-day ordeal if you have to remove the lazzenette and other boat bits
Many people updated their johnyrude 9.9's to 15 as they were the same displacement block and only differed by carb and timing
However if you think you can. Spend hours looking at parts manuals and service manuals to see if you can
I agree
however your weight you posted doesnt pass the smell test.
no way to get only 7500# with a 5580# dry weight (spec for 5.7 liter motor) and a 1200-1400# trailer unless you have no gear and empty fuel and water tanks.