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I have a 1998 5.7L 2bbl w/ thunderbolt V and just recently the tachometer has not been reading correctly. its consistantly ~1500 RPMs off where it should be. the gauge does activate every time but isnt correct. is this more likely the gauge or the electrical signal to the gauge. do these gauges...
How would I best clean the tank? I did a few things that hopefully should work. I pumped it dry (had 25 gallons) and replaced the fuel filter/water separator. Also I replaced the line from the tank to the first filter.
ill take a look at the anti siphon. it seemed to be working when i was draining the gas tank because it took forever to pump out haha. but ill see if its gunked up.
also when i let it sit off for a a minute it would start and rev slightly but then choke out again. maybe that is the anti siphon.
This one is my first post here and is a story so i appreciate the read...
TLDR: engine wont rev past idle and sounds like its choking out.
Engine: 1998 5.7L Mercruiser with a 2BBL carb.
I bought this boat from a good friend who never had engine issues with it but hadn't ran it in 3 years...