For stand-alone (non NMEA or CAN) gauges
The tach works on pulses from the switch box. Most marine tachs are universal with a selector switch
Speedometer is either pitot tube or GPS
Water pressure works off water pressure
Volts work off volts
Trim, water temp, oil pressure all require...
What information are you looking for?
Stamas only made the hull, they bought all the bits to bolt onto it
There are no electrical schematics except the ones published by the motor manufacturer.
Being a 35 year old boat means this is a project
2-strokes do not need oil pressure gauge
You should add a water pressure gauge
Fix the pitot tube
Fuel gauge will depend on type of fuel tank. If you have portable tanks, there is a gauge on the tank
iBoats sells gauges
The engine in the pic is not a GM based motor, so a GM short block will not work.
The only choice is another Mercruiser 6.2
If your motor was a 2013 or older, you could get a GM 6.2. (5.7 block, 3.75" stroked rotating assembly - crank, rods, pistons)
Have you called your insurance company...
There are two ratings.
Horsepower and weight
The horsepower rating is how much power before the force from the prop tears the transom off
There is total weight rating, as how much total weight of motor, people and gear you can load in the boat
Do not exceed the horsepower rating
As you add...
there is no horsepower limit to an I/O or inboard boat. you can have 1 million HP in a 7 foot boat.
However. any cam overlap and you suck water in from your exhaust. unless you are running open headers in a jet boat.
any electrical device must be SAE J1171 compliant to prevent sparks
the...
understanding reversion and cam overlap
understanding IMO and USCG regs
Understanding why SAE J1171, CFR 33, sub-reg 183 in its entirety and not having any surface warmer than 200 degrees keep you from blowing up.
