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I meant 4000 Do agree try to get as much as you can off, maybe it will break free

Tabs are intuitive to use, you'll figure it out easy. Mostly about leveling the boat while cruising.

Yes, even if its 4200 it will probably be destroyed getting it off. Is the sealant hard or soft?

Being raw water cooled the motor should have 140* thermostat. The 160* can cause the salt to deposit inside the motor. Can also have Bravoits issue. Put a piece of clear hose at the thermostat housing hose which comes from the raw water pump, to check for air bubbles

Glad your ok, you could have been hurt or worst. Take the surface area in square inches then multiply that by the pressure in the tank.

Agree, looks like 5200 and if so, will need to chisel it off Mine had a problem, but cleaning it didn't fix the issue, had to replace

Don't know your particular boat but its a USCG requirement to have access to those fittings. Wonder if there is something under the carpet? If it's not there I guess its cutting time

I can leave the auto part off, and most the time I do. The issue with the last one was the auto was off but when I used the tabs it turned the pump on and wouldn't shut off

Its how many pulses come from the coil per revolution. A 4 stroke 4 cylinder produces 2 pulses per revolution, I would think it would be 2

Installed another, waited to calibrate until Bennett was on the phone. Did that and its working like all the others except the last one. Its not hanging but still trims to much. He is going to talk the the engineer again to see what they say Sure wish I never heard of autotrim

Just noticed a forgot the pic

Suggest trying to use the return key more, this is real hard to read Using that much fuel, your plugs should be wet and fouled

The check ball also stops the motor from sucking fuel out of the carb bowl when running

TanFS I know itrs not the Merc carb its the 2GC and is just there to see how one carb uses the check ball. With yours when the pump is moves down the check ball is under a spring and that keeps the pump from sucking air. Note the slot in the pump cylinder. This is where the pump gets fuel

The check ball is used in the accelerator pump circuit. It allows fuel to be sucked in, because without it the pump would be pushing fuel back n forth with no pressure. The gif below is for the 2GC and note how if works

I would buy this one https://www.ebay.com/itm/Mercury-8M0058164-PUMP-ASSY-FUEL-/203541428338?_trksid=p2349526.m4383.l4275.c10#viTabs_0

The fuel pressure might be to high. Anything above 6 psi can cause the issue. Being a 1989 you should have 2 gaskets and one plate between pump and block. The thick gasket and plate reduces the stroke, and thereby reducing the pressure the pump puts out...

My opinion Sierra quality control is not the best. They build stuff in most cases like the OEM but not always exactly like the OEM. The stuff that won't meet OEM requirements are sold to aftermarket

Sierra will work, not a fan but they work

Yes you pump has ruptured the internal diaphragm. The vent tells you the diaphragm has reptured