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Just a heads up for those that might be planning a Trip up the Rideau from Kingston, if you have a fly bridge you will not be able to pass through the Lasalle Causeway, It is being rebuilt and 2 weeks ago there was an incident that has severely compromised the structure, as it was originally...

Ladies and Gentleman I wish to thank you all for such fabulous advice concern and support over our term as custodians of Cartouche our beloved to us Mainship 390. Life sometimes gets in the way and we had to look deep into our selves, and realize it was time to part company. We are very...

Cartouche our beloved Mainship 390 is for sale she is Canadian registered by name out of the Port of Montreal. She is at the dock in Kingston Ontario. we Purchased her in 2017 and have full documentation and contact with all the 3 owners she has had since Launch. She was originally purchased and...

Looking for confirmation of my thoughts on changing the Yanmar Cartridge filter. The Raycor is fine I change every 50 Hours no problem. I am looking for confirmation on my thoughts, before trying myself 1/ Turn off fuel flow at tanks 2/ Remove Drain plug at bottom of Cannister, (Catch fuel in a...

In The Mainship manual it tells me to make sure when engine and generator are running that the cross over line shut offs "Must be Open" why would this make a difference? reason for asking is I am trying to level the boat and take out the port list by shutting off the crossover - at present the...

Can someone let me know how you rotate a picture on this site very frustrating I think for allot of users. Many thanks

Does the Shore side water hook up self drain on a 390 if not how do you get plumbing anti freeze into the fixture up here in the frosty north for the winter

The Project Just a heads up for all coming up the Rideau through Kingston this year I copy a letter back from the engineers re the Fourth crossing being built presently over the Cataraqui river just passed the old Rideau marina site. This will effect all transients of this area, and especially...

Have to add a Breaker to our AC Panel on a Mainship 390, does any one know when I remove all the screws is there then easy access to the back of the panel? how do you support the panel when accessing the back? or is there access to the back that I am missing with the panel being left in place?

Need to add a Breaker to my AC Panel on a 2003 Mainship 390 does any one know where to buy the Breakers for this panel many sorry picture is sideways thanks

Need to add a 2nd Charger for my Stern thruster where can I buy the fuses on the AC panel on a 390 I am going to use one of the spare accessory Breakers

We Have a Mainship 390 with a single Yanmar 370 HP fuel will not draw from the Port Tank, Equalization valves are open Generator and return fuel goes back to the starboard tank. after changing Racor I opened Port and starboard Tanks and both flow to the Racor. What am I missing,?? when fueling...

We have a Mainship 390 with a single Yanmar 6LYA and 2 days ago the Tachometers and both the Lower and upper helm stopped working along with the Hour meter. I am hoping something simple, but not sure where they pick up the revs from the engine I am thinking around the flywheel but not sure. many...

We have a Mainship 390 that has a list, (Not uncommon for a 390) and I have been having fuel Balancing issues, at my last fill up I put 3 times the diesel into the Starboard tank than the Port tank and a fellow TF member suggested that after use when the boat is at rest the list is allowing the...

We have a Mainship 390 with 2 Tanks port and starboard. I noticed a considerable list to Port yesterday (Fuel gauge was showing just off full) yesterday we fuelled up for the first time this year, and the starboard tank took $225.00 of diesel and the Port tank only took $50.00 of Diesel. both...

We have a Mainship 390 with 3 Bilge pumps plus the High water pump, I Must be doing something wrong We launched this week, and I accidentally left the water running when cleaning out my water tanks the tank filled then started filling the bilge, It wa sup to the bottom of the engine (I was not...

Today up here In Kingston Ontario Canada we Launched, what a sweet feeling to go aboard when all the crew was gone and to realize this Is Social Distancing at its ultimate. sure was a sweet feeling. Hopefully the Rideau will open but we still have the beautiful Thousand Islands, The world seems...

I have Trim Master Trim tabs on my Mainship 390 do you use just 32W Hydraulic fluid or something else. Also I heard somewhere that you can hook up the trim tabs to the gear shift and when you go in reverse The tabs will automatically retract. Has anyone heard of that scenario, Many thanks

I am looking for confirmation on my Fuel burn numbers it seems awfull cheap to run for me but Math is Math Cartouche is a Mainship 390 up in Canada so we only use her 5 Months a year she has a single Yanmar 370Hp with a Koehler 8KW Generator which we have only put 4 hours on since purchase in...

We have a 2003 Mainship 390, and I am trying to locate the Hydraulic reservoir for the trim tabs, Motor is working fine, but the tabs will not move, I am sure I have a leak and just need to trace the system many thanks

We have a Mainship 390, and are wanting to install an articulating rudder, we are in Ontario Canada, anyone have any leads as to who sells and or manufactures them. Many thanks

We have a 2002 Mainship 390 with a Yanmar 6LYP 370 Hp I have noticed that when we go out when I bring the boat up to approximately 2000 RPM sometimes there is a thud like the sliding door closing. no vibration and after that all is fine slow down and come back up and never again a thud. any...

Have a Yanmar 6LYP can someone remind me of Fluid capacities, I think it is 20L 15W 40 Oil includes Filter replacement and 20L -100 Green for Raw Water, for winterizing am I close, Thanks

We have a 2002 Mainship 390 with a Yanmar 6LYA STP engine, engine would not start, was in neutral, Played with the shifter, and then starter engaged, and Started fine, Shut off and started right back up, is this a starter issue or another issue, Many thanks for any help

I have a Racor 900 MA on our Mainship 390 with a Yanmar 6LP, which I need to service, Is the only thing I need to do is shut off the fuel tanks to stop the flow to the filter, and then Drain and remove the cover. or is there something I have to do, to stop fuel coming back from the engine...