Moving on to the overheat problem. Checked everything I could think of. Had what seemed a good coolant temperature drop across the heat exchanger, so thought the flow must be okay. Out of ideas, I pulled the riser and it was pretty restricted. Visually, I can only see the space between the...
Thank you. I have the factory manual and have been poring over it! As I posted a moment ago, that leaves me wondering why fixing the connection of the purple yellow at the coil solved the idling problem. Coincidence? Then I wonder what really was the problem.
But it makes me wonder how that bad connection could have been the cause of the idling problem, since that wire wouldn’t carry any charge on the key is in the Run position.
Thanks. The Mercruiser manual (#8, p 4A-4) says that wire supplies coil only in Start position, which makes sense to me.
Which wire provides the voltage to the coil from the ignition switchwhile the engine is running?
I’d like to find a diagram that identifies all wires and voltages to and...
Thanks all for the further replies. I put a third carb on, from the starboard engine, which was running fine. No change -- the port engine still wouldn't idle below 1800 rpm. So, not a carburetor problem after all. I started thinking about weak spark possibility and tracing every wire I could...
NEW NEWS
Last night I was flushing the 180 carburetor with gas as well as I could while leaving it assembled, hoping I might discharge any dirt at the needles/jets. I spotted a crack in the casing (lower right corner of photo). I don’t know where it runs internally, but I imagine that could be...
Thank you all for your replies. I’m replying to your questions here, and new info in my n xt post.
The first carb (“the 180 carb”) started easily and idled fine for each of my three Sea trials this summer, so hasn’t been sitting since it operated well. The flooding (?) problem started during...
(Does anyone remember my 2023 posts where I thought I’d be sea trialling in two weeks? HAHAHAHAHA!! First sea trial was this May. And still not cruising.)
My 180 won’t idle. It seems like it’s flooding. Its starts easily if I give it quite a lot of throttle, and sounds fine above 2000 RPM. When I ease the throttle back to 1800 or less, the rpm goes up and down a couple of times, then stalls.
Recent history: The two 180’s are new to my boat, so I...
I bought a 1983 26' sedan cruiser on a trailer. It needs lots of work, but my plan right now is to get it seaworthy enough to launch and see how it feels, then decide how much time/money to put into it. I want to have a depth sounder before I launch.
I know approximately nothing about depth...
