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2004 Mainship 400. My interior cabin light above the lower helm does not work. I don't use it but I know it worked when I bought the boat 4 years ago. This light has 2 switches. One on each end of the fixture. It has two FL tubes in it. One is regular white while the other has a red filter...

I have a 2004 MS400 with twin Yanmars. I would like to replace the foam filters on the turbo air intakes but they want an arm and a leg for Yanmars. I know boats are expensive but come on, it is really just a cheap piece of foam. Has anyone found a suitable generic replacement? Mine are...

Hello all, I have a 2004 Mainship 400 with twin Yanmars. I have Faria gauges and at the upper helm, the volmeter no longer works on either engine. The starboard engine started acting up first and a couple taps used to get it going again. Now nothing on either engine. I have 5" Faria multi...

I have a 2004 Mainship trawler with twin Yanmar Diesels. We have owned the boat for about 18 months. Last time we went to take the boat out in early December one bank would not turn over its engine. I was able to use the parallel switch and fire it up. I have original style 4-6v batteries...

I have a new to me (end of last year) 2004 Mainship 400. Still learning about the boat and systems. I have the transom fresh water wash down system in the stern locker. It has the plug in coiled hose with a spray nozzle. My problem is I cannot seem to get the hose to lock into the receptacle...

We got our first trawler at the end of last season, 2004 Mainship 400. I have a Raymarine C80 chart plotter at the upper helm. Last couple of times out it started acting up. Powers up fine but sometimes will not start updating or showing navigation for 30-45 minutes. Sometime it will start...

I am the relatively new (couple months) owner of a Mainship 40 with twin Yanmars. Getting ready to do an oil change. Each engine has a gray plastic/rubber hose fitted to the oil pan. They are a couple feet long and just have a plastic plug shoved into the open end. Is an added on item or was...

I got such great help on my last question so here is another one. As mentioned in the other post. We are new owners of a 2004 Mainship 40. I noticed a couple of the indicator lights on the DC panel are out. I unscrewed the panel to look and it appears these are not a simple bulb replacement...

New Mainship 40 owner here. Been reading about switching lights over to LED's. Is there a simple way to switch over the twin fluorescent fixtures inside the cabin to LED? I see plenty of bulb options for the small G4 courtesy lights but have not seen any discussion on the fluorescents. Thanks

Hello: New guy here looking to join the Trawler World. My wife and I have looked at a couple boats and are currently looking at some 2004-400 Mainships. Some looking has been on line but on one we visited in person, my wife says the interior wood is a lighter color. I am not sure it is just...