Likely not 1/4 plywood, as it is not strong enough. On a cover that size, even 1/2 plywood would need reinforcement, across the short side.
Best to pull the vinyl off and see what you have. 1/2 plywood is easily replaced, and can be made as well as the original.
QBhoy Clamshell cowling found on 80's Merc 150s swing open from the front. The style solid cowling in your picture looks like my '93 Merc V6. The decals also look like the early 90's motors. My motor has a 2::1 gear ratio, but the gearcase is from an '88 Merc 150V6.
A silver disc on top of...
Optimax uses ports on fuel and air rails to diagnose engine issues. These will clearly indicate is fuel pumps are working and if air compressor is working.
You might look into a set of gauges. They are similar to a/c gauges, but would require different fittings. May be adaptable?
Yes, Some might conclude that12VDC is used by the powerpack, if one looked at the wiring diagram, and specifically traced the yellow/red wire from the starter solenoid, to the powerpack.
However, there are alternate facts, or so I have been told.
If they want to mass market that prop, the price will need to get to $1500 or so.
it does not look that hard to cast, so that should be doable.
Remember, the first new integrated circuit of a new design costs $500K. After that they cost a few cents apiece, but you need to amortize the initial...
Gauges need ground, power and some kind of sender. Power and ground are common to all gauges, If more than one malfunctions, suspect power and/or ground. Likely all gauges are powered by one small amp rated fuse.
Gee, I think it depends on the trim of the boat.
My 19' SeaRay I/O was butt heavy, as most I/O boats are. Power adjustable Trim tabs helped a lot, as you could put the tabs down, and back off the throttle, in rough seas.
My 21 foot dual console has O/B power. It is nose heavy. I do not...
That motor likely feeds +12VDC to the powerpack when the starter is cranking. After the ign key is set to run, the ign power is all from the stator.
You might start by testing for +12VDC at the power pack when cranking, as she may not start without this auxiliary power.
That motor will have 2 zerk fittings on the distributor rotation linkage. Have they been lubed?
If the distributor won't rotate (make sure it isn't against the stop), likely something solid got into the rotation sleeve. I have never seen this, so it is a guess, likely a SWAG.
Throttle cable must push the throttle closed. Adjust the barrel nut until it does, with a little preload.
if she still runs too fast at idle, you can back off the "idle stop" set screw. It is located above the distributor. You will then again need to adjust the throttle cable to push the...
Show us a picture of the transom, especially where the antiventilation plate falls in relation to the bottom of the hull. What is the height of the transom? I would expect a 20" transom.
Johnson/Evinrude have their own recommendations as to what to use on crankcase edges. It varies by year.
On my '98 V6 they specify OMC Locquic primer followed by OMC Gel-Seal II
Om my 1959 Fat Fifty, OMC specified permetex #1 hard setting gasket compound.
What does your engine specify?
Gee, several of those Lucas synthetic 2 cycle oil products are not TCW-III rated. They advertise that "It is formulated to meet or exceed ISO EGD, JASO FD and API TC.". Anyone know those certifications?
