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It is not recommended to operate any electrical device on a boat with the battery switch in the "off" position, as doing so could damage the electrical system or the device itself.
However, if you want to be able to operate the tilt and trim switch on your 2018 350 Mercury Verado with the battery switch off, you could install a separate battery or power source for the trim system. This would require some rewiring and installation work, and it may not be feasible depending on the configuration of your boat and engine.
If you are not experienced with electrical work, it is recommended to consult with a qualified marine technician or electrician for advice and assistance with this modification.
Trim/Tilt switch needs power from somewhere to operate.
You can remove the engine's positive lead from the BAT selector switch and attach direct to a battery. I would need more info on what you're wanting to accomplish to give a better answer.
Tilt and trim adjust the angle of the motor and thus the running surface of the boat, ...the grip on the water, the ability to jump on plane and many other operations ... be around the base of the ram, or drip down around the power tilt and trim motor. ...Sometimes you can bang on the power tilt and trim motor with the head of a ...
Have you check the engine coolant temp sensor to make sure it isn't reading too cold and making the fuel trim too rich. Also, may want to check for a vacuum leak or bad MAP sensor. The engine control module uses these sensors to keep car running until operating temperature is reached and then the oxygen sensor takes over..
You are correct ,a cool running engine will never come out of open loop and will run rich until the logic module see's at least 180 degrees of coolant temp,at that point it looks at all sensor inputs and calculates the correct fuel trim according to engine performance as evaluated by all sensors. Think of it as having the choke on until the engine is warm. The easiest way to confirm is hook up to an engine scanner and look for fluctuating sensor values,which will indicate that there data is being evaluated
loosen engine mounting bolts and steering tube , trim engine up by releasing the valve on the side and tie up so not tocome down ! remove pin on the ram then remove all bolts and wires and should come out !
Operate Trim Switch Do You Hear Clicking Sound In Engine Yes ,No
Step 2:
If Yes Check Wiring To Power Trim Motor are All Cables Tight If No Then The Trim Relay And Or Trim Switch Is Probably At Fault
Step 3:
,Remove Three Large Color Wires Going To Power Trim Motor Black, Blue And GreenConnect Black Direct To Negative Battery And Blue To Positive Battery Motor Should Trim Up ,Remove Blue Then Try Green To Positive Battery, Motor Should Trim Down ,If Nothing Then Trim Motor Is At Fault If Works Then Trim Relay/s Are At Fault
It should have power trim. In the engine compartment, either on the left or right side you should see a hydraulic pump with a tank to hold the fluid. There will also be hoses running to and from it. There should also be a switch at the helm that allows you to raise and lower the drive.
1. Freeze Powertrain Control Module (PCM) and see if the problem can be duplicated.
2. Wiggle tug test wiring for #2 injector.
3. Scope the #2 injector for a glitch when the misfire happens.
1. Test for the Exhaust Gas Recirculation (EGR)/coolant adapter gasket leaking EGR gases past the gasket.
2. Connect a vacuum pump to the MAP sensor, block the vacuum source, reset fuel trims, start the engine and add typical vacuum to the MAP sensor and check operation.
3. Test the spark output with 2 High Energy Ignition (HEI) testers, at 25 KV air gap each, at the spark plug wires to ground at wires 2 and 3, then 1 and 4 at cranking speed and engine running.
4. Test the fuel injector pulse width at the injectors compared to the scanner data.
5. Disconnect the O2 sensor, reset the fuel trims, test the system operation in open loop, test injector pulse width. Compare to the closed loop operation injector pulse width and engine operation.
6. Test the Powertrain Control Module (PCM) powers and grounds during the problem.
I've done this many times
You will need a tubing cutter
Screwdriver
I think a 7 or 8mm socket
hose clamps
the appropriate amount of heater hose
zip ties
cut the steel heater line at the front in a place you can get access to,leave yourself enough steel hose on the rear to allow you to put the heater hose on cut off the steel hose and discard, and use 2 hose clamps on either end do the same for the other heater hose,this way is cheap and easy and permanant.Be sure that when you run the heater hose keep it away from hot or moving parts,use the zip ties to fasten it along the way,this should take about a half hour or so depending on your skills and working conditions,remember to buy some antifreeze to top up the system because you are going to spill some,remember to clean any spills animals love it and it is deadly.
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