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Just looking to see if anyone has any quick advice for this... I get a vibration on my 390 Sundancer between about 2800-3300 RPM that smooths out after that and cruises beautifully. Bottom is clean. First V-drive boat, any help to leads to get this figured out is much appreciated. I would think...

Seeing conflicting advice on this.... I have a 2004 390 Sundancer and adding a second amp, I currently have a Fusion 4 channel 1400 watt amplifier connected in place after we removed the factory garbage amp, I am adding a Fusion 5 channel 1600 watt amplifier as well... Do I have to wire directly...

I have been trying to search for a better answer on this.... My boat has 2004 twin 8.1s Mercury Horizons with about 900 hours on them. I have been trying to find a mechanic to come to the boat for some miscellaneous/maintenance work but one after the other keeps blowing me off, I finally found...

Can anyone confirm the part number for the 8.1/496 Horizon impeller kit with wear plate? I searched and searched and can't find a definitive answer, I have also found impeller kits that just contain the impeller, wear plate, and gasket... Then another kit includes a new plastic housing. Any...

Hi everyone... On a new-to-me boat I have four batteries connected in parallel on two banks. The prior owner has a group 27 and a group 31 on each bank (below). The manufactured dates are 3/21 on the 27's (Duracell) and 7/20 on the 31's (Odyssey), the PO never did work himself, the marina always...

Hi all, looking for assistance with a MerCruiser 8.1 horizon, it’s a new to me boat… it seems to run pretty well overall but it has a hard cold start, and will not get up to temp at idle, it only gets up to about 140°… it will reach 165° while underway and holds that temp solid. Also while...

How's it going all... I have twin 8.1 Horizon's with the port having a rough cold start. Additionally it idles at about 50-100 rpm lower than the starboard motor once it's warmed up. Before I started the engines today (they were cold, hadn't been run in 24 hours) I wanted to see what the...

Looking for fast help if anyone has the knowledge..... I have my 390 loaded on the back of a truck and the hauler can't go anywhere until he can remove the arch supports. To do that he needs to get to the bolts in the cabin, the bolts are behind the trim that surrounds the skylight, there's two...

Anyone have any good traveling mechanics in Southeastern Massachusetts? Just looking to have someone come to my house after I get my 390 on blocks and stands to do all the maintenance and maybe more heavy work if/when the time comes. Thx!

Has anyone found a great replacement for bad water drain actuators on the 8.1? I am getting ready to replace mine and I just want to get them out of the system completely. I'm in Massachusetts so I need to do a full winterization anyways. The drain actuators are in bad shape.

Hi all, I’m looking at a 2004 390 Sundancer, it appears to be in decent shape but one of the engines (370hp 8.1’s) was replaced 50 hours ago, the other has 900 hours on it. The generator was replaced two years ago, I don’t have the hours on that. I’m pretty hesitant because I’m not sure if the...

How's it going everyone, Im looking to move into a larger cruiser, I was originally looking newer but I really like the styling of the 380 and 390 Sundancer's, I like the center stern walk-through for the 380 but I like the cabin of the 390 better. I see a lot of them with 8.1 V-drives and a...

Hi all, I am receiving an error message for "Coolant Loss" on a 2018 Kohler 5EKD genset... I was having a massive problem for over voltage all summer and it mysteriously went away after a mechanic partially disassembled some electrical components and reassembled it. It worked great for one day...

Hi everyone... So I am looking at a new outboard powered cruiser (twin 350 Verado's) and the fuel figures aren't too appealing. The review for the boat says it won't stay on plane under 4500 RPM (33 mph) so I am wondering if anyone has any experience on ways to either keep the boat on plane at...

Hi all, considering biting the bullet and upgrading to a new 2019 350 SLX, I know new boat pricing has been discussed before but just checking if anyone has any real world experience with this, or a similar, model. With an MSRP of about $360k im hearing discounts all over the board, from 15% all...

Just checking if anyone in the New England area purchased a 2010 330 Sundancer last summer and named her "Ships 'N Giggles"... I have your documentation renewal at my house haha.

My transducer recently stopped reading depth and water temp randomly to my gauges and Raymarine. I believe a fuse may have blown as I got some water in the bilge and some connectors got wet then blew fuses. Is there an in-line fuse for the transducer? It’s the factory airmar set up to my smart...

Does anyone know what would cause the steering to hiss as if there is air sucking in or blowing out? It was happening only when I would turn the wheel to the max left or right but now its started doing it all the time. The sound is coming from the area of the steering wheel. Also, the steering...

Does anyone know where the location of my trim tab fuse should be? The boat is a 2017 290 SDX, I believe I blew the fuse working on the boat the other day but can’t find it.... I applied +12v to the power side of the switches at the helm and can get the tabs to move so I’m 99.999% sure my issue...

I am trying to upgrade the subwoofer to add a little more low end on my boat... Part of the problem is finding access because its hidden under the helm seat I believe. Judging by the rest of my system i'm pretty sure the subwoofer in the boat is a Rockford Fosgate PM210S4 4-ohm subwoofer. My...