Find a used carburetor at your local boat shop.-----Find one on E-BAY.-----Drill and tap for pipe thread and a new nipple.----Choices are endless.-----Your location ?
Nope----The carburetor on that motor simply fills due to gravity as the tank is higher than the carburetor..----The is no fuel pump.----There is no diaphragm.----It is just an elegantly simple set -up.-----Not sure why you are having this issue.----Fuel is drawn from the float bowl when air goes...
Motor just moves / works against water.-----Motor really does not know what is behind the boat.----The boat operator notices that the result is a slower boat.----Motor works the same.
Not related to your issue, but have you installed a new water pump impeller in the last 5 years.----If not it needs one.-----Do a spark test.------Good spark will jump a gap of 3/8" ( 1 cm ) on a test device.----Report what you find.
Once again----There are no high speed mixture needles on a 1972 model 50 HP.---Johnson / Evinrude used FIXED high speed jets on most big outboards starting in about 1962 !!!!
Myself I would stick with a 1980's model 88 / 90 HP Johnson / Evinrude.-----A wonderful , easy to maintain motor.----Of course my opinion does not matter.----I rebuild those V-4 OMC with no need to look at a manual.-----
A 15" pitch might be the correct choice.----But step #1 is to make sure motor is in good condition.---And make sure boat is not waterlogged.-----And I know you said it " runs amazing "
What do you mean the carburetor can not be taken apart ?---5 screws and the bowl is off to work on float / float valve.----Carburetor can then be cleaned.
Let that jar sit for 2 more days and post a picture then.----New boat / new motor ?-----Have the dealer clean out the entire fuel system.-----Did they do the pre delivery check ?
Fellow called me a few years ago.----Asking about his MERCRUISER unit he had just bought.----He answered a few questions and I coaxed more information from him.----I determined ( over the phone ) that he had an OMC electric shift that had been painted black.----Perhaps to disguise the stringer...
