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  1. S

    1972 marine trader rudder box failure

    PO probably ran aground and it pushed rudder up or it flexed enough to crack the fiberglass. At some point you will want to take a dremel and excavate the crack. Repair with epoxy. You might want to install a piece of angle iron for reinforcement. Then start rebuilding for strength by adding...
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    raymarine gyroplus 2 - nema 0183?

    Manuals for RL70, DSM250, Gyroplus, etc are still available online. figure out the pinouts/wire colors and get your multimeter out. Or do what your car dealer does. Replace everything until it works.
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    raymarine gyroplus 2 - nema 0183?

    DSM250 is simply an analog to digital converter. Very old technology (as is nmea 0183.) They are available on EBay for $50. Simplest solution.
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    "Crystal Clear" vs off brand "Marine Vinyl"?

    If I ever drove from the upper helm in rainy weather (I don't) I would opt for Strataglass in front. It's a 40 gauge pressed, polished and coated vinyl material, scratch resistant and UV protected. It also requires maintenance and is expensive. Side and rear curtains get the cheap stuff. They...
  5. S

    Dealing with "chine slap"

    Soft foam ear plugs.
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    rudder question (marine trader 40 sundeck)

    It is the return valve and bleed mechanism. The bleed screws are on the valve, not on the hydraulic cylinder.
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    Three Blade versus four blade propeller

    I have not noticed any significant difference between 3 blade and 4 blade on my 22" props. I went with 4 blade because they had what I wanted in stock. In theory, with equiv. pitch, 3 blade should be a bit faster, but in practice I am unable to detect a difference.
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    Prop Question

    I doubt you would see a huge difference with an inch in pitch on such large props but are you able to reach max rpm at WOT with existing props? If you are just buying these as spares then the pitch doesn't matter.
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    1995 Raymarine autopilot on GB 42

    Typically located in hanging locker. Close to centerline, away from engine. But PO could have put it anywhere. Follow the cables. The controller and course computer make up the system. Most likely failure mode is course computer. Check the fuse along with all wiring. Check power at pump with...
  10. S

    Repair help needed!

    It depends. If you are restoring the boat to original condition or maximizing resale value or you love projects, then remove and replace. If you want to enjoy this season on the water then slap a layer of fiberglass over it to keep water out. Buy lots of sandpaper. Looks as though it has been...
  11. S

    Has anyone rebuilt there twin ford lemans in a Grand Banks 36 in the boat?

    what are compression numbers for each cylinder?
  12. S

    Block Island a good side trip?

    Don't go on a weekend. Otherwise it's a nice stopover.
  13. S

    Crack in er hatch beam

    I would use more than one, but you may gouge your head on the nuts when moving around ER.
  14. S

    Crack in er hatch beam

    The crossbeams are removable. They support the deck sections (aka hatches). It is possible the crack appeared when someone dropped the hatch from vertical position. The weight of the hatch is spread out along 4 edges so the crack is not critical but should be repaired. Put it on your spring...
  15. S

    GB 36 propane locker update advice

    You do not have to remove the manual valve. Simply disconnect and bypass it. Yes, it can still be used as a redundant valve but it's two potential leakage points.
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    GB 36 propane locker update advice

    Adding the solenoid is easy. Figuring how to vent the port locker is a bit more difficult. As I recall you can't vent over a window below that might be open. A stand alone Trident locker might be easier to install.
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    Forum Update - We're back! Ask your questions here.

    I really like the new look and feel. Great job on the update! Thanks for all the work put into it.
  18. S

    For Sale: Twin Disk Transmission. MG502 RH 2.0:1

    You're right. He used your photos. Seems to be a legit scam, he has good reviews on EBay. Some comments mentioned shipping problems and other issues but he resolved them apparently. He must have used the Facebook API to scrape FB data and will delete an item for sale on EBay when the FB...
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    Rejecting a vessel prior to survey

    Sounds like you can revoke the offer. I would be as detailed as possible re. reasons. The process will go smoothly if the owner knows about the problems you note in your cancelation. Just saying "i don't like the curtains" might not be received well. You may be on terra firma legally but seller...
  20. S

    8D starting battery replacement

    I used a 2X6 plank from ER diamond plate to cockpit sole pushed batteries up. Then used cardboard to pull batteries across cabin and deck. Only manual part was from deck down to swim platform, and from platform to dock. Keep back straight when lifting. Once cracked L5 when bent over. Took years...
  21. S

    Aging

    79 and stamina isn't what it once was. knees are going, harder to crawl around the outboard sides of the twins. Biggest issue is solo docking. I'm just not as agile. Running around, jumping onto a dock. just no. Prev owner kept it until he died. Could not lift the hatches so didn't do any...
  22. S

    Engine overheating

    and of course check coolant level.
  23. S

    GB 36 wisdom inquiry

    You will love the ability to head in any direction at any time. You will not like the noise of twin diesels. A bow thruster is not necessary unless you single hand a lot in high wind high current docking scenarios. You can spin the boat in it's own circle with twins. I stay off the throttles and...
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    Any experience installing a rotary drive AP on a GB 32?

    In addition to rotary and linear drives Raymarine sells a hydraulic system that can be run in parallel with your existing cable system. Install a bronze tiller arm on the rudder post ( above the existing quadrant), add hydraulic cylinder and pump, connect to your Autopilot and controller. A...
  25. S

    Tow Request - What would you do?

    Otherwise, call USCG or SeaTow. Times have changed. We live in a very litigiousness society now.
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