Ok, so I pulled the throttle apart this weekend and none of the wires appeared to be damaged. While I had the throttle open, I checked and was getting power to each wire. When i pressed the trim button down I was getting power to the green wire and the same when I pressed the button up for the...
I just ran some test the pushed the shifter forward, neutral, and reverse and for a split second the motor trimmed down from the switch but it stopped after about 1 seconds and nothing again.
I did some further diagnostics with the test light on the solenoids the top one is fine when I push the...
Alright, I need some help with this trim pump on my 1993 Gulfstream (Merc 3.7 Alpha 1 Gen 1). Over the weekend, I replaced the carpet in my boat so I had to remove all of the side panels and move some of the harnesses out of the way which included unhooking the harness to my trim pump. Long...
Ok so I got a major coolant leak and I’m hoping it’s not a blown head gasket. I’m working on a merc 3.7 488, and recently I drained the coolant system to replace the seals on the heat exchanger and a leaking riser. Today when I went to replace the coolant, I put one gallon in and a few seconds...
I have a Bayliner with a 488; when i bought the boat, the helm gauge wiring was corroded to the point where it needed to be replaced. So far I have replaced the main engine harness and all of the wiring to the accessory switches (Bilge, lights, ect) but not I need to replace and clean up the...
What’s a good replacement engine for the old 488. The one I have is bleeding coolant and possibly seized. Any ideas of a good replacement motor I was thinking the 3.0
Alright guys I need help confirming my motor in my project boat is toast.
Mercruiser 488 3.7 with closed cooling system
Been working on this boat for a while now, but I think I'm to the point where the motor is toast. When I got the boat the electrical system was a mess and the trim wasn't...
Alright guys another question when attempting to crank the Mercruiser 488, the starter clicks but the slave solenoid doesn’t seem to be doing anything. When I turn over the motor i am 100% sure the starter is clicking but I hear nothing from the slave solenoid. When I attempted to jump the...
Alright guys I needs some advice, I recently acquired a boat with a Mercruiser 488 that has sat up for an unknown amount of time, the engine itself looks pretty good, however, it is dry, no coolant or no power steering fluid. The did stick shows a little milk which I’m hoping is nothing more...
