The engine service manual will have engine, controls and gauge related wiring.
ABYC wiring codes will allow you to trace the remainder (posted in sticky in electrical forum)
The 4.3 was a production truck/industrial motor made by GM and marinized by Mercruiser with parts available everywhere
The 4.5 is a Mercruiser designed and built motor with parts only available from Mercruiser
Some internal parts are similar
Other than that, they are both V6's
Could be as simple as a deteriorated battery not spinning the motor fas about that the ecm knows you are trying to start it, a bad ground or blown fuse, as moderate as mice damaged wiring or it could be as catastrophic as a bad ecm
Injectors run on a PWM signal by the ecm pulsing the ground...
Seriously doubt the motor or drive will be wearing out. Most gasoline motors will go 5000 hours or more with proper maintenance, diesels will go 20000
Boat motors are normally killed by lack of maintenance
The boat on the other hand....
Plastic bits last 10-15 years max
Upholstery about the...
bud of mine uses the standard bumper sleeves that his wife sewn together. takes the cheap $7 attwood bumpers.
easier to store than the goofy taylor made cushion and about 1/5th the cost.
Mercruiser doesnt warranty past 5 years.
on the old GM based motors, I would keep up with 15W40 or 25W40
on the new Mercruiser designed motors they still are calling out for 25W40
https://www.mercurymarine.com/en/us/landing/oils-and-lubricants/
My guess there is a label issue and it should...
I have been buying the 2.5 gallon jugs from Amazon. https://www.amazon.com/Shell-Rotella-Protection-2-5-Gallon-Single-Pack/dp/B01LH7KPUY/
$42 for 2.5 gallons
the price of the correct carb gasket set is usually less than the cost of a complete correct kit. I have made base gaskets and bowl gaskets in an emergency.
Explain what you mean by "backfeeding"?
you mean putting AC in the outlet and then hoping to get lots of 12 volt juice out the other end?
They do not work that way.
Inverters only work one way. you put DC in on one end and you get AC out the other. As Ted mentioned, when you add an inverter...
No, that is most likely a scam site
Due to copyright laws, you can only get manuals from Mercruiser. Sites claiming manuals are usually phishing and scam sites
Get the manual from http://publications.brunswick.com/
