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Not a problem at typical sailboat speeds. Running on one engine at 10 knots for long periods could result in overheating. The oil pump is not pumping while free wheeling. If engine is not running a PSS seal ay high speeds might need an alterative source of water.

Glycerin will eliminate the soap bubbles

Electronics have an undetermined lifespan. Marine environment is harsh so lifespan is going to be something less than forever. You are using obsolete electronics that may be at the very end of their lifespan. Buying old electronics on EBay is a known risk and you knew that at the time of...

Typically you would decrease pitch when switching to a 4 blade. If you are too fast at idle throttle then you might be over propped. Increasing pitch would result in even more thrust at low speed. You can decrease diameter or pitch on your 3 bladed props to achieve your desired performance to...

4 blades are much better at low speed, better economy and more bite so better response, (assuming you adjust pitch to get same rpms at WOT.) I think price and availability are bigger factors. 4 blades are more expensive and may be special order.

Random wave slap drives me crazy. Soft foam ear plugs and I don't hear a thing.

Large chunks can get stuck anywhere from pump to cooler. Small pieces will end up in cooler. Disassemble all hoses and run a piece of wire through them.

My first guess, and easiest to confirm, is broken wire or corroded connector. Every connector pin should be bright and shiny. Trace every inch of wire for breaks. Note insulation could be intact but wire broken around sharp bends. (Have somebody watch display while you jiggle wires coming out of...

If you have Cat 3208s you probably have TwinDisk transmissions. Search for manual online. Not uncommon for PO to disconnect safety switch.

If you don't know how to use search engines to find a manual then you probably shouldn't attempt to tear apart your transmission. The pressure relief valve mentioned is part of the control assembly., a simple item to remove and inspect. I suspect your problem is worn clutch plates but checking...

It is more likely than not you have worn clutch plates that are slipping. I would expect to see higher heat during operation but you would need a baseline for comparison. Shop will charge you min. $750 for clutch overhaul, you deliver transmission to them. It's a very simple transmission, easy...

PO probably ran aground and it pushed rudder up or it flexed enough to crack the fiberglass. At some point you will want to take a dremel and excavate the crack. Repair with epoxy. You might want to install a piece of angle iron for reinforcement. Then start rebuilding for strength by adding...

Manuals for RL70, DSM250, Gyroplus, etc are still available online. figure out the pinouts/wire colors and get your multimeter out. Or do what your car dealer does. Replace everything until it works.

DSM250 is simply an analog to digital converter. Very old technology (as is nmea 0183.) They are available on EBay for $50. Simplest solution.

If I ever drove from the upper helm in rainy weather (I don't) I would opt for Strataglass in front. It's a 40 gauge pressed, polished and coated vinyl material, scratch resistant and UV protected. It also requires maintenance and is expensive. Side and rear curtains get the cheap stuff. They...

Soft foam ear plugs.

It is the return valve and bleed mechanism. The bleed screws are on the valve, not on the hydraulic cylinder.

I have not noticed any significant difference between 3 blade and 4 blade on my 22" props. I went with 4 blade because they had what I wanted in stock. In theory, with equiv. pitch, 3 blade should be a bit faster, but in practice I am unable to detect a difference.

I doubt you would see a huge difference with an inch in pitch on such large props but are you able to reach max rpm at WOT with existing props? If you are just buying these as spares then the pitch doesn't matter.

Typically located in hanging locker. Close to centerline, away from engine. But PO could have put it anywhere. Follow the cables. The controller and course computer make up the system. Most likely failure mode is course computer. Check the fuse along with all wiring. Check power at pump with...

It depends. If you are restoring the boat to original condition or maximizing resale value or you love projects, then remove and replace. If you want to enjoy this season on the water then slap a layer of fiberglass over it to keep water out. Buy lots of sandpaper. Looks as though it has been...

what are compression numbers for each cylinder?

Don't go on a weekend. Otherwise it's a nice stopover.

I would use more than one, but you may gouge your head on the nuts when moving around ER.

The crossbeams are removable. They support the deck sections (aka hatches). It is possible the crack appeared when someone dropped the hatch from vertical position. The weight of the hatch is spread out along 4 edges so the crack is not critical but should be repaired. Put it on your spring...