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Looking for input on ideal prop replacement for my 2001 390 Mainship Yanmar 6LP-STE. S/N 53218 with Velvet Transmission - S/N 20-01-006. Ratio 2800:1 Current prop 25 x 25 Any input greatly appreciated. Bill Minder Rambling Rosie

Thanks guys for all your input, I feel a lot more comfortable taking the measurement.

Thank you. When I back up that nut with the boat start to fill with water?

Does anyone know the correct packing material size for a 1.75" shaft on a 2001 Mainship 390? any input on manufacturers would be appreciated. Thank You!

Issue has been resolved, the culprit being the low pressure switch. Thanks to everyone for your assistance. It was a great relief to gather everyone's input as my mechanical skills are very limited but this old dog is still capable of learning a few things. Bill Minder

Will do. Having the part order now to catch in transit in Fort Myers Florida thank you both for your help in this situation as I was very concerned I had a bigger issue. I will keep you posted as to my progress.

HI Rich Ran down the list Tranny good Fuel Good Coolant - a little low, filled, burped and capped Started up, alarm sounded, moved rpm up from 700 to 1200 - alarm went off. Started backing, at 1000 alarm went off. Repeated several times. Every time rpm got over 1100 alarm went off. Seems...

Thank You for the quick response. I will run the check list down and report back.

At anchor north of Tampa. Started engine and alarm went off both on lower and upper helm. Had no indication of any problems when we anchored last night. Both alarms are two wire set-ups. Same colors on both. One being purple w/green stripe, the other tan/lt brn? w/blue stripe. Upstairs Helm...

Great Suggestion. Thank You!

2000 Concept Windless. Studs were full of rust. Cleaned and painted. I have UP but not DOWN. D2 stud on motor is spinning and not seating. There is power to the stud but not to the motor. Any suggestion on how to repair and/or what type of service would be required to repair? Thanks

Thank You for the reply. If you come across your drawings would certainly appreciate you forwarding as I little to no engineering skills. If you text me I will forward my email. Bill MInder. 239-571-9646

Thanks again for the information. I will let you know what I end up trying. My current thought is to go with the 7/16".

Thank You for the timely reply Thanks Gary that site is perfect. When you replace yours did you find the window channel tapers inward or is it a true 1/2" channel? If so, my assumption is you used the 7/16' width X 7/16" depth. My zipper is "rotten" so I can't get anything but crumps when I...

Our window zipper weatherstripping has deterioted. I’m measuring the window channel width as 1/2” but am not finding zipper in this size. Does anyone know the exact replacement size and where to procure material. Any advice appreciated. Thank you.

Hello Jay. Purchased a 2001 390 and am planning to do the loop and the Erie Canal so have a need to hinge the mask. Can you share with me how your mast project came out? Did you end up hinging up from the deck or did you hinge at the deck? Have your been happy with the result? Has water...

Purchasing a 1996 390 Mainship trawler in the Titusville, FL area. Does anyone know a surveyor in the area that specializes in trawlers and/or Mainships? Any help would be appreciated. :)

380 hp Yanmar, single screw with generator