Anything new installed alongside the inner side (gunwale) of boat such as screws, speakers, upholstery, shifter control handle / area?
Long screws will often catch / chafe the wiring along the gunwale.
Seems you're getting close...Good job.(y)
Possibly depends on the original year of the boat/original engine year as the 90 amp fuse didn't really get started until 1997/98 model year/s though some started a yearish earlier and some even had them in the 80's... So just depends but if the 04ish reman engine model was fully dressed with...
Maybe something's touching (shorting) the other purple/yellow wire mounted on the engine starter or connected wrong (< at starter?) after engine work.. was the wiring disconnected in different areas while working on the overall engine? Something pinch a wire during installation maybe...
See if this may be of help to you…https://www.perfprotech.com/blog/articles/mercruiser-engine-harness-schematic?srsltid=AfmBOorM3GXaFmZEIgjkM2qTQwBKwePP_BIEHm4OESV2fjmT8Ee1iJJ8
What year engine model? Serial number handy.
Decent chance you have a bad connection at the Main wire harness 10 pin cannon plug at the engine… With the key on wiggle the wire wire harness and watch the gauges. See if they turn on and off.
If not, leave key on and start carefully wiggling all...
If desired, give that link in there another try as I was able to locate the tread in question online and then repaired (reedited) the link so it works now... Or here's a direct link too,
https://forums.iboats.com/threads/volvo-est-timing-procedure.267126/
The first black wire photo may have been for mercruiser mercathode system had your engine utilized the corrosion protection from new or installed later as it's an option on some models and standard on others.
https://forums.iboats.com/threads/where-does-this-wire-go.678185/...
Not too sure of reattachments but the following may help with other visuals guides for you too...
https://www.mercruiserparts.com/bam/subassemblydetail/40391449/28167762...
From Hardin Marine,
https://www.hardin-marine.com/c-2252-trim-pump-fittings-and-lines.aspx
Your Price:
$2.82
Quantity Add to Cart
More Info
Outdrive Trim Hoses - Short Radius (Priced per Inch)
137-8403
Outdrive Trim Hoses - Short Radius (Priced per Inch)
This is a longer custom...
While I recall seeing a few beveled type washers here and there over the past years, at the moment finding a new one isn't ringing a bell yet but mostly wanted to mention that the Prop locks from Mcgard uses a beveled type washer that has to be installed a certain way out that may work out for...
90 psi compression seems pretty low. That’s actually seems scary for a new engine?…. Something might not be set up correctly internally… might be worth doing a leak down test too just to be sure.
Should the engine check out fine after awhile internally like hoping, then I’d also lean towards...
Personally, with everything described of the engine defaults and things tried, I'd be concentrating on the MAP sensor from testing of all the circuits, the sensor itself and ultimately trying new MAP sensor that should be Merc part number 8M0087834 and ensuring the spark plugs are clean of fuel...
There are plenty of Mercury dealer websites that you could input your engine serial number and have them delivered to you...
Here's a pretty good site used for many years of boating forum help,
https://www.bammarine.com/
Or one could also search launch mercury parts lookup and a list of sites...
