I have a 2004 Response LXI Monsoon 340 that I have had an ongoing issue with the  ignition relay's on the wiring harness cluster being popped. The boat will run great but the relay's and harness tends to get a bit warmer than I feel they should.  When I turn the engine off if I don't crack the engine cover and make sure to let the heat dissipate from the engine compartment the next time I try to fire to boat up it will either not start or start then shut of at which time it will not fire again. If I switch the relays around the boat will fire back up but if I was just running the boat this  can take some time or needs to cool down.  I also try and make sure when i am just casually putting around the lake  I have the engine cover cracked or at least blower on.  Any one a similar experience or thoughts or and what could be causing this.  I now carry a couple extra relays in the boat with me. 

Thanks Ed

The center bilge area by the belly plug is the lowest part of the boat, so water will tend to accumulate there.  Lifting the bow as high as possible may allow the bilge water to drain out the rear drain plug at the transom. 

To loosen a stuck belly plug, I will often use a small hammer to tap on it several times, then use a long curb water valve shut off tool for leverage to remove the belly plug.  Worse case, if the T-handle on the belly plug breaks off, the plug and garboard fitting can be removed and replaced.  There are only 4 screws holding it in which can be accessed from underneath the boat.

Is the bluetooth device running to an AUX input or to RCA's? It may be a loose connection to the audio input or something simple like that.

If you really do have a bad bluetooth reciever, I have a used JL MBT-RX that worked when I took it out to install the Wetsounds radio in my boat. I would let you have it if you covered shipping costs, if you are interested.

Based on the described use, you are best to have one Cranking and one Deep-cycle battery. The deep-cycle is better for the house loads. 

Now, the answer to core question, you need enough battery Ah. More Ah came in the form of a larger battery than the current or adding another deep-cycle in parallel to the existing house battery to make one larger battery. Just note. its not ideal to wire a new battery to an old battery. So if you go the 2-battery house bank route, start with 2 new same size and type batteries.  

So, we had some water in the center ski locker. Rather than pulling out the plug through the hull, I opened the opened the plastic plug that I thought/assumed would drain that water back to the bilge where I could then drain in out the transom plug which was already out. However, I was surprised to see a gush of water coming IN to the center ski locker area. The bilge was (or should have been) completely dry already since the transom plug had been out after 20+ miles of trailering, including some long and steep inclines.

So, what I'm wondering...

Where was that water coming from that was "trapped" in the boat and gushing into the ski locker despite having seemingly already drained the bilge completely dry?

I'm also unable to get the thru-hull plug out in the center ski locker. The prior owner or whoever put that in last, tightened that thing so damn tight. I'm out of options to find ways I can get enough leverage to loosen that thing. Any tips would be appreciated on that as well.