Join Date: Nov 2007
Location: East Providence, R.I.
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So, if the temperatures are 10 degC and 50 degC respectively, convert both to the absolute temperature scale (just add 273 to both) and write as...
rho1/rho2 = (50+273)/(10+273) = 323/283 = 1.1413
...or about 14 percent more dense.
The motor would rather breathe the denser air.
On a typical boat gas engine w/ a computer, the computer would compensate via the O2 sensor and meter the injectors.
On a typical boat diesel w/ just a mechanical fuel pump, it would just run leaner w/ denser air.
same fuel/more air = leaner.
Put the same diesel boat in a lake (if it exists) in Denver Co. and the lack of air density @ 1mi. above sea level and POOF! it will run richer. This is why older cars in higher elevations had to get the carbs. re-jetted smaller.
A gas engine boat w/ computer would run the same because the computer would compensate.
I'm still betting the OP just needs to really clean the injectors....
Ken, East Prov., R.I. Bootlegger, PY26 Paceship
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