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    5.7 EFI running hotter on starboard exhaust

    I removed and inspected the water pump and impeller expecting to find a bad impeller. But it was in great shape. Normally, engine runs around 160 degrees then when thermostat opens it drops to 120. The other day it was running around 180 until thermostat opened dropping it to 160 but no lower. I...
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    5.7 EFI won’t turn over

    Turn key and nothing, no click, no gauge activation, nothing. The rest of the dash panel is getting power it’s gotta be electrical going to the key right?
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    Temporary loss of power

    5.7 EFI. Serial number OLO12923 i thought I posted earlier so apologies if this is a double post. Recently I posted about a lot of piping sounds and severe loss of power. Unable to get on plane. Replaced cap, rotor, plugs and wires and it ran great for the ne t day. Today after a few hours...
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    5.7 knocking and power loss

    5.7 EFI began knocking and losing power today. right from clutch when I brought the RPMs up it would pop randomly and surge and loose power. It does not do it while in neutral and reved up. I finally got it up to 3200 RPMs and it ran fine. after running for 15 minutes I brought it down to...
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    Bravo 3 trim issue

    5.7 EFI with bravo 3. The trailer switch was removed by a previous owner do limit switch is not the issue I assume. Prior to yesterday the button on throttle operated the trim/tilt all the way up and down. Yesterday I was underway for 5 hours, got back to the ramp and it would not tilt up at...
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    5.7 temp sensor

    I noticed that since I’ve had the boat the temp gauge usually gets up to 180-200 despite having a 160 degree thermostat. Today I changed the thermostat and gaskets and sleeve and ran it on the hose. It still went up to about 180 before dropping. I grounded the temp sensor and the gauge spiked so...
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    Bravo 3 leaking water into bilge

    I always seem to have water in the bilge after a day in the water so I decided to do a little exploring. I put the boat in the water and took the below video. It’s not great but hopefully you all can tell what your looking at better than me. I did t have a lot of time so I did not experiment to...
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    Bravo 3 turns hard starboard underway

    Mercruiser 5.7 with bravo 3 and at pretty much any speed but worse at higher speed she will turn hard starboard as soon as I let go of the wheel. I understand this is not normal but I have just dealt with it over the two years I’ve owned it but now I want to figure it out and solve it. There is...
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    Trim pump problem

    I know this may be an old post but I'm having a similar issue with my bravo 3. My resivoiur has about a 1/2 inch play from where it connects to the pump. I assume there should be no play and perhaps that's causing my issue? Thank you for any help
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    1998 5.7 steering fluid leak

    Serial number 0L012923. I have to keep adding fluid every other trip. My trips are like 10 hours long (fishing). It's ending up in the bilge and results in a sheen when I turn the bilge pump on. The resivoir cap is tight but after a long day is almost empty. No leaks from the line coming out of...
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    1998 5.7 EFI oil pressure sensor

    Recently the oil pressure gauge started jumping all over the place. I suspected the sensor and was able to put my hands on it and I can spin the black plug about 180 degrees back and fourth really easily. I would assume that plug should not be able to spin but maybe I'm wrong. Is that a clip...
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    1998 Mercruiser 5.7 EFI fuel leak

    I have not dug into it to much other than looking at the fuel filter and shut off. After fishing today. I pulled the plug after the day and there was a strong smell of gas in the bilge water. Any likely places I should start my search on an EFI? I've done some searching on here but can't find...
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