Re: Low buck projects- Let's see 'em!
I am restoring a Nor'sea 27 that sank. The engine and engine controls and all the associated electrics were ruined. I installed a reconditioned Yanmar 2QM15 that I bought a few years ago and new engine controls.
Finding a Type B engine control and instrument panel (key switch; push to start button; high temp and low lube oil pressure lamps; buzzer) for the cockpit was problematic because they are no longer made (and have a list price of over $1000 if one were available).
I checked the wiring diagram in the engine manual and decided to build my own. I had an old ignition switch in my toolkit (free). I bought two dashboard indicating lamps (about 2.50 each) and a push to start switch (about 7.00) from an online hot rod supply warehouse and a couple of 12V buzzers from Amazon (about 3.00 each).
I finished a piece of half inch okume plywood that was a cutoff from another project with Interlux Brightside; drilled holes and installed the push switch and indicators; and installed the plywood panel in the cockpit. I mounted the ignition switch and the buzzers inboard. After wiring the system it worked perfectly - provides engine start controls and visual and audible instrumentation for high temp and low oil pressure- and cost me less than twenty bucks.
I used a little dolfinite to seal the indicators in their holes and a little BoatLife caulk to seal the panel against the cockpit well bulkhead.