Hi all
I have a 1976 75 hp Chrysler, my spark plugs are getting very dirty quite quickly and will only run for a day or two then will conk out. but with new sparkys it will run fine again.
Any suggestions as to why?
Hi all
I have a 1976 75 hp Chrysler, my spark plugs are getting very dirty quite quickly and will only run for a day or two then will conk out. but with new sparkys it will run fine again.
Any suggestions as to why?
Possibly too much oil in the gas.That motor needs to run 50-1. 1 pint oil to 6 gal.
That OK then reset the air screw.Top front of carbs.Screw in till it just bottoms out.Then out 1 turn.
You need to have it in the water,in gear and the motor warm to do final adjustment.
Turn in the screws(one at a time)till the motor just starts to miss/cough or stutter. Then out 1/2 turn.Do this on all three.Give it a few seconds to catch up between adjustments.Rev it up between carbs.
How old is the diaphram?Replace it if it's older than a year.J
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88 Bayliner with 2002 225 HP Mercury
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In Scenic Beautiful Sebastian by the sea Florida
Thanks for the info.
The ratio i use is 1:50, and i will try the air screws on the carby.
Sorry about the lack of knowledge but what is the diaphragm and where is it located.
Is the motor warming up ( thermostat in place if equipped with one )---------------------Fuel pump diaphragm should be checked as well.---------------------Will spark jump a gap of 5/16" or better.
Diaphragm is in the fuel pump.Thermostat is located on the top of the head above the plugs.
Get a manual and fill out the profile,you might be close to someone who can help.J