Thank you for the info. We'll see about a pressure test.
One thing I failed to mention earlier is the oil pressure gauge was reading fairly high at all times. Usually around 60-70.
We couldn't figure out any reason why that would be. Could that cause issues?
Ok so it's a VERY long story....
Original and actual boat is 1990 180 horizon. Had a 4.3 omc in it. That motor was cracked. We found a 89 invader with 5.0 merc in decent condition but the hull was horrible.
We spent last year changing everything over to merc. We replaced a few things like...
We had a beautifully running early 90s merc 5.0 that we just replaced all the pistons, gaskets and carb. It ran really well for the first 7 hours of breaking in and then a spark plug popped out of its socket. We stopped the engine and installed new spark plugs.
Ran the boat for 30 minutes and...
Moving on at this point to other things then.
The boat has the 8 pin cannon plug. The donor motor has the 10 plug. We can seat them together but obviously 1 pin is not connected. Is there a decent way to fix that? Is it necessary to fix that? If I remember correctly it's pin 4 for engine alarm.
So installed an HEI distributor and found that the coil had no power. We ran a wire from batt to coil + and are getting spark. But now we can't determine where the loss of power starts. We can see that the purple wire on the harness isnt getting volts....Checking the ignition switch shortly.
We didn't do anything with the wiring beside connecting the harness.
One update, the 8 to "10" pin(although only 9) update wasn't done. But all I can tell is the pin 4 from the 10 pin is not connecting, which is for the engine alarm. Is that an issue? Is there a proper way to connect the...
Alright, so we were able to fit and transfer the entire setup for the 5.0 merc including the outdrive. The only changes we had to do was create the 2 forward engine mounts and move them up forward about 5 inches. The other thing we dealt with was the steering linkage reqd larger bolts for the...
I have 2 options of fixing up our blown 4.3 omc in our Horizon 190.
I have an old family boat that hasn't ran for 10 years but is clean and looks good. Has a 5.0 in it, but will require us to pickup over 600 miles away. Also costs us 1500 for the boat.
There's a local boat that has a 260 in...
Well we got the 302, that's done. I'm in this project for the ability and cheapness to get it in the water and have some fun, not spending money on something for more horses or go. I asked my question and anticipated a little more help at least....
As for the 302, I will need to get a flywheel...
I have a potential 5.0 upgrade in sight. I found an older Merc mcm888 from the 70s for $200. Wondering what's in store to get it installed in my boat. The original motor has very new accessories, but the block and heads are cracked pretty good.
Is it like swapping in the Penta 5.0, or will...
