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  1. jonelli

    1987 Mk II Lower Shroud U-Bolt Failure

    Had a different failure first... Mainsheet traveller block snapped in heavy winds during a small jibe and the boom went flying starboard and smacked the lower shroud and broke the U-Bolt. It was clearly corroded to begin with, and I know I should check them all...
  2. jonelli

    Steering drain through hull

    Want to replace this. I have a 87 mkII. is there a standard size thru hull? assuming this was original? looks like about 1” to me. But I’d have to get my calipers and/or pull it first. Do you recommend just pulling it first then go search for the replacement? Or can I get something ahead of...
  3. jonelli

    PSS replacement job

    I had an old PSS seal that I wanted to change out. I ordered a new one based on recommendations from the manufacturer. When I went to install it, I noticed the rubber bellows are different than the original. The new one has an insert that goes over the stern tube and the bellows goes over that...
  4. jonelli

    Stern vents - screen options?

    I’ve had Rat issues a couple times in the last 6 months and have determined they get in through the air vents on the stern. It’s just a big hole there and I’d like put some kind of screen in them. Has anyone done this or give me some creative design ideas? For now they are stuffed with steel wool.
  5. jonelli

    Cutlass bearing strut set screws

    I'm going to be attempting to change my cutlass bearing out in a few weeks. I've read that some struts have set screws, and some don't. Out of curiosity, I called Catalina and talked their very informative Warren in tech support and asked if he knew if my 87 MkII had them. He explained that...
  6. jonelli

    Mark II Rudder questions...

    I have a 1987 MkII. As far as I read through everything online, there's nothing to it but something that holds it up top above the tube and a couple of shims between the rudder and the hull. I have not disassembled anything yet other than inspecting the quadrant wheel. I have been hearing a...
  7. jonelli

    Haul Out - Help with my shaft - SoCal

    Hey All, I'm doing my haul out first weekend of May in a DIY yard in SoCal. Besides painting, which I don't really need any help with, I plan on swapping out the cutlass bearing and the PSS shaft seal. The PSS seal is due, and since I've got to release the shaft to do it, I figure I might as...
  8. jonelli

    Oberdorfer Pump Snap Ring - Official Answer

    I know there's been lots of discussion about using the impeller without the snap ring over the years. I've read a lot of the threads. I also read that some believe it was just for shipping and you don't need it once it's installed on your boat. I thought I'd ask them directly and see what I...
  9. jonelli

    Mast cleaning/buffing... without climbing?

    This may seem like a silly question, but I can't get either of my two helpers to clean/wax the mast for me, and neither will haul me up there. So either I've gotta get up there by myself, or find another way. I've tried a homemade mast ladder and couldn't move when I got to the top from muscle...
  10. jonelli

    Salt Water Foot Pump = Broken/Spun Impellers

    This was an interesting phenomenon. In the last year and a half, I've been in the middle of a weekend trip and while sitting on a mooring somehow had failed impellers twice. At first, I chalked it up to inferior impellors, and was just happy I kept old spares. But then I realized something...
  11. jonelli

    Clew attachement replacement

    Sorry if I don't know the specific name of what I want to fix, but the strap that was lashed between the clew ring and the boom track slide on my main broke this weekend. I'd like to fix it "right" but on my own. Just wondering what the best way to do it? Some random webbing, and hand sew...
  12. jonelli

    Main sheet cleat location

    Hey all, just curious, but I realized after fixing a lost shackle on my main sheet cleat, that my setup may not be like everyone else’s. I posted in the FB group and got some confused responses. I guess I never thought to look at anyone else’s Cat30 setup. My boat came this way when I got it...
  13. jonelli

    Anybody know if there's a master "reset" for a Raymarine ST4000+ autohelm?

    I already have the user, service and installation manuals. I can see the default values on the Dealer setup page. Is that it? Just set them all to those and it's "reset" or is there a reset mode somewhere I can't find? Also, I've heard switching from wheel to tiller and back to wheel...
  14. jonelli

    Pedestal base squeak/creak?

    87 MK2 with standard Edson wheel pedestal. I noticed recently during the past couple of trips that very occasionally I would hear a small creaking noise in the floor just under the pedestal while motor sailing with autopilot. It didn't correspond directly with any of the wheel movements. The...
  15. jonelli

    Raymarine ST4000+ Autohelm dead again - Need help!

    My ST4000+ head unit died again and my repair guy doesn't think it's repairable. Does anyone know of any alternative solutions for the MK2 wheel drive w/fluxgate compass? What else works? I can't seem to find any used ST4000 units out there. Do any and all of the "ST" models work with that...
  16. jonelli

    Batteries/Combiners

    Hey All, Ran into a situation I wanted to ponder with your thoughts. Several years ago, I rewired my boat like this with a battery combiner: (Combiner 100 Sheet) My batteries were starting to get a little tired recently, so I replaced #1 first since it was the most "worn" and I would replace...
  17. jonelli

    Mercury 3.3 2-stroke Carb issue?

    I know these are generic motors, Tohatsu, Mariner, etc... And I've got the service manual. But, before I remove or replace the entire carb, I want to be sure there isn't something else I can do first, so I'd like to ask for some advice. Here's the issue I can describe: It will start up GREAT...
  18. jonelli

    Low Power/RPM Universal M25XP

    I've been trying to figure out why my motor is having a hard time recently getting up to 2000RPM when in gear. This is a new problem. I've posted about it in several other threads and already tried some things, but I'm still looking for advice. It will go from idle to 3000RPM in neutral. I...
  19. jonelli

    Exhaust Riser "mixing elbow" questions

    I’m dealing with a new low power/low RPM under load issue described in my other thread. I’m pretty convinced at this point that I need to check the mixing elbow for carbon blockage. I have a ton of questions. I have also been reading a lot. The consensus seems to be that I should not expect to...
  20. jonelli

    Engine power issue

    87 mkII with M25XP I just spent a few days in Catalina. Motor sailing the entire time. the way there everything was normal, cruising at 2200RPM, no issues. after anchoring and then leaving to fish, I couldn’t get the motor over 2000RPM at all. Last time that ever happened I got kelp wrapped on...