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  1. J

    Clanking/rattling sound after prop change

    Thanks. To clarify. I went from SS 3 blade to Aluminum 4 blade. But I agree with you. I think the 4blade is lugging the engine. Never thought it could have such a big impact.
  2. J

    Clanking/rattling sound after prop change

    Thanks. It is there. I've replaced at least 10 propellers in the last few years. Thrust washer > hub > prop > adapter> tab washer > nut. Nut is tightened to the specs and tabs bent. The prop runs smoothly.
  3. J

    Clanking/rattling sound after prop change

    Thanks. Is it normal for that to happen after a prop change? Will take pictures next time I'm close to the storage. Timing has been unchanged since I bought the engine a few years ago. It has always performed well...at least, as you said, I never heard that sound before. I doubt it, the noise...
  4. J

    Clanking/rattling sound after prop change

    Hi Folks, I searched the forum briefly but couldn't find anything similar. 17' Cadorette (Thundecraft) BR Nuova 170 . 1998 Mercruiser 3.0 Alpha one Gen I (Replaced head gasket last year - ~8 hours of use) A few days ago, I switched props from a 3-blade SS 14.25 x 19P to a 4-blade Aluminum...
  5. J

    Very thick heavy weeds - Is that the problem ? or what ?

    I know it's an old thread but this likely happened to me today. I Went boating to the Toronto island approx 15 miles from the ramp I launched. Navigated the channels within the island. Parked the boat for about an hour. When I hit the throttle after leaving the island, the boat wouldn't come up...
  6. J

    Proper way to wire a kill switch on Thunderbolt IV

    Had the chance to measure the current drawn by the ignition system. It's about 3.7 amps ( ignition only without instruments) Installed the seadog switch (which is actually rated 10amp); it works like a charm.
  7. J

    Temp switch went off - overheating engine?

    Oh no. The Sierra that failed and I replaced with the Merc, had been in the engine for 2 or 3 years.
  8. J

    Temp switch went off - overheating engine?

    To wrap this up. I replaced the Sierra temp switch with Merc OEM and the issue is gone. Tip: the Merc original Temp Switch retails for about 80 or more. Instead, get the entire Audio Warning Kit from eBay for 50 bucks or so. It includes not only OEM temperature and oil switches but the warning...
  9. J

    Audio Warning Kit's Time Delay Relay Repair

    Couldn't find the exact answer to my question so here is a short write-up about repairing the Audio Warning Kit. There are mixed opinions online about the time delay on the buzzer. Many like it sounds as soon as you turn the key, others prefer it doesn't go off right away. The latter option has...
  10. J

    Audio Warning system disable with Key on engine off for Radio?

    I guess it depends on the type of ignition switch your boat has. My boat has a four-position ignition switch: Battery, Starter, Ignition, and Accessories. If I turn the key to the left, it enables the accessories only; this is where your radio has to be wired to. When the engine is running, the...
  11. J

    Temp switch went off - overheating engine?

    Spent some time troubleshooting the boat's alarm issue. Now I'm pretty confident it's the temp switch. To my surprise ( as I hoped it would), the alarm didn't go off when I turned the ignition. So I took the boat to the lake armed with a brand new IR thermometer. On the water, in neutral, I let...
  12. J

    Power Trim Help on 3.0 Mercruiser Alpha 1 Gen 2 will go down but not up HELP!

    Seem widely available. I just did a quick search on eBay Solenoids https://www.ebay.ca/itm/112056452576?hash=item1a1715c5e0:g:ekYAAOSwGXtXh7Sa Trim Switch https://www.ebay.ca/itm/194143708554?hash=item2d33dde58a:g:5FsAAOSwWUJgpohC Be aware that replacing the trim switch is a PIA. The outdrive...
  13. J

    Temp switch went off - overheating engine?

    Thanks, Chris. By fast idle I mean 1000 RPMS. At the ramp with the boat on the water and trim all down, I did bring it close to 3000. Temp sender and gauge seems to work fine based on my initial testing. IR temp gun will tell the truth. It's so strange that the alarm went off when I turned the...
  14. J

    Temp switch went off - overheating engine?

    No. But unless it broke out of the blue, engine was fine at the ramp and performed well all the time. And if it broke, so did the temp gauge? I'll bring a IR temp next time I get my hands on the boat. I want to think it's just the temp switch that went bad. Hopefully!
  15. J

    Another blown head gasket - Fuel Mixture?

    To close this topic up. I put together the engine without messing with the carburator nor the timing. The engine runs like a champ now (Pat myself on the back for adjusting the valves first time right 😉). No more rough idle..it's super smooth and quiet. Power is back. At this point I strongly...
  16. J

    Power Trim Help on 3.0 Mercruiser Alpha 1 Gen 2 will go down but not up HELP!

    And yes, trim limit switch is another possibility. Turn the drive all the way to starboard and check the cables aren't broken (mine broke long time ago,). If they are, then bypass the trim switch limit cables inside. If it still doesn't go up after that it's either the UP selenoid or the pump...
  17. J

    Power Trim Help on 3.0 Mercruiser Alpha 1 Gen 2 will go down but not up HELP!

    If it goes down but not up, then the fuse isn't the problem. There is only one fuse feeding both selenoids. I once experienced something similar. The relay or selenoid contact was all rusted...mine stopped going down, not up. I took apart all the selenoids and the copper bar...cleaned them all...
  18. J

    Temp switch went off - overheating engine?

    Hey folks, 17 footer 1992 Cadorette bowrider 3.0 Merc 1998 Alpha one gen one. Need your input here. I just replaced the blown head gasket of my 3.0 (reconditioned/resurfaced the head and had the block's flatness verified) and I also replace the ripped exhaust bellow and installed a brand new...
  19. J

    Another blown head gasket - Fuel Mixture?

    An update here. I had the head resurfaced. The engine shop guy said the head was in pretty bad shape. Also, he's 90% sure the head's imperfections blew the gasket. The block is as straight as it could be. I guess if the engine went 60 hours with a messed up head and rev abuse, it should last...
  20. J

    Another blown head gasket - Fuel Mixture?

    The boat is 17 feet; 2200 pounds (According to nadaguides). Max rpm is 4800 (now I know) Drive ratio...not sure it appears to be 1.94 Max Speed on my GPS Speedometer ~47 mph. I normally cruise at 30-35 mph.
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