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get new switch covers

Forget the meter.

It looks like you have an Airmar B744V "triducer". It has a paddle wheel for speed? They require a 2" hole. The direct replacements for a modern CHIRP with 2" hole are B765(LH, LM) & B785M.

Check the connection of the "motor to battery" or "Starter" cable. The Neg will be connected to a battery and the Pos will be on the "feed" post of the Battery Switch. A good test would be to connect the Pos and Neg motor wires directly to a battery. That bypasses all switches and jumpers...

Hard to tell with the paint ..It looks like you have an Airmar B744V "triducer". It has a paddle wheel for speed? Its mounted on flat spot. Its just the bronze housing, no plastic fairing? They require a 2" hole. The direct replacements for a modern CHIRP with 2" hole are B765(LH, LM) & B785M...

It has electronics that control a RELAY that Combines (makes parallel) the batteries when there is a charging source(running motor). It isolates the batteries when there is no charging source(motor not running). There are thresholds of voltages that cause Lockout(prevents Combining). Without the...

idk what the mechanicalal key/start is like. On my fly by wire, the KEY does not have a start position, just an ON position. There are start buttons for each motor. Running to the start solenoid sounds like a good option. Like seasick said, there are a lot of underlying causes to electronics...

Exactly!

Go on blue seas site and look at the diagram and instructions

I pondered doing something with the bubble and after a half assed assesment determined it was more trouble than its worth. I'm pretty sure you have to remove the windshield

If the house is separate from starting batteries, then starting motor cannot effect the House 12v. Separate your 12V House from the starting batteries https://www.greatgrady.com/threads/new-battery-config-for-265.25744/ If you have ACRs on your batteries they should be SI (start interupt)...

Sometimes they stay open a little until water pressure closes them but they should not be pushed out by the tube

Cut the old flap off and use as a gasket to extend it out. Thats what I did

I think your GT51m will do great for bottom fishing and as your everyday go to. The GT51 will read depth for tiles in 450-600. That'll do. Its very hard to bottom fish deeper than 600 when drifting. Drift the canyon at night for tuna/sword, your baits are 150/100/50. I would get a B175HW for...

If I remember right, the red button has small philips screws and ring terminals, like #10. IMO too small for 6 gauge wire. Get yourself a cable lug crimp tool on amazon. get a switchable breaker with 5/16 lugs. Seems on bigger gradys they ran 6 gauge to a terminal block under helm then 10...

Probably your 40A 12V House breaker. Your manual should show it. Disconnect the wire and see what doesn't work. Red button breakers suck. They rust. They are not "trip-able". You can't use them to turn off the circiut. Get an MRCB (marine resetteble circiut breaker) You will probably need...

You are kind of in a pickle. If you want a good look at tuna /swords drifting at night, you are much better off with a "High and Wide" like the B175HW or now they have a B175MW Medium & wide. They have extremely wide beams to see whats high up around the boat but, of course, these don't read...

oh ya... Winterize Flush with full tank of clean water then pumpout. then flush 1/2 gal of RV pink antifreeze into tank.

new flaps on amazon https://www.amazon.com/dp/B0019M5JPY?psc=1&ref=ppx_yo2ov_dt_b_product_details See this thread to replace the tubes https://www.greatgrady.com/threads/transom-maintenance.37746/post-267266

https://www.greatgrady.com/threads/265-not-so-fresh-water-tank.37764/