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  1. Tycer

    140 w/ 470 drive RPM & MPH #s

    4500 is WOT
  2. Tycer

    140 w/ 470 drive RPM & MPH #s

    This is a follow up on this thread: https://forums.iboats.com/threads/merc-140-motor-470-outdrive.722537/#post-5478672 Thanks again for all the replies. With a bit of calculamating and trials I’ve gotten the disparity sorted. The boat is an Aristocraft Nineteen, about 1800 pounds and these...
  3. Tycer

    3.0 exhst riser 1/8NPT drain plug ALUMINUM?

    Hey guys, My aluminum drain plug has anoded away on the exhaust riser. Is it supposed to be aluminum so that it works as an anode? Or can I replace it with brass.
  4. Tycer

    What does preignition sound like?

    Hi all. Thanks again for all your help with the coil issue! I am concerned about possibly having too much total timing advance. There’s a light rattle I need to track down this weekend, but it does not fit my past automotive experience of the sound preignition makes. My mental recollection of...
  5. Tycer

    Total timing advance too high?

    Man I like this new fangled timing light. I have no idea what it would’ve cost me 20 years ago when I would’ve been using it regularly. So it looks like I’ve got too much timing advance. All in combined it’s about 41°. Do I need new springs? Anybody got a part number? EDIT- I just read that I...
  6. Tycer

    Coil? I've never had a bad coil.

    MerCruiser 140. Recurring problem. New to me boat. All ignition parts except dizzy replaced before I got it. Motor will run well for hours at <3200 rpm but go over that and the spark breaks down in short order. Dead in the water. Check points gap, still good, no dwell reading. Remove cap, gap HT...
  7. Tycer

    Coil? Never had a coil go bad.

    Mercruiser 140. Recurring issue. Dwell and timing set. Run a couple of hours and it dies. Below 3200 rpm seems ok. Above and she dies. Fuel ok. Vent ok. Filters ok. Jets squirt fine. Hook up the meter. No spark. No dwell. Pull cap, put cap HV lead from coil to a decent gap from ground. Operate...
  8. Tycer

    Why is one terminal copper?

    On a 50a ignition protected circuit breaker. Why is one terminal copper and the other steel?
  9. Tycer

    2Jet Carb settings?

    My Mercruiser 140 (6920118) has the MCM 470 Rochester 2Jet that was probably the carb that came with the boat’s original 470. When I rebuild it, what settings do I use? The carb numbers don’t show up on any chart I have found.
  10. Tycer

    Helm clicking loud when turned off center?

    Checked advanced search first. No love there. The '78 Aristocraft Mercruiser 140 has a lot of play in the steering (15*?) and there is a loud clicking at the helm (under dash right of helm). How do I diagnose? I do not know how the steering system works. ps The steering is much harder to...
  11. Tycer

    Accurately set dwell. Which meter?

    Which dwell tach to buy? My old dwell tach works but the 8cyl scale starts at 15°. Since most of these use a double-the-8cyl-reading for four cylinders and I want to set my dwell at 28 I want to get one with a wider scale. Bought one on auction site but it has a bad SET pot or something...
  12. Tycer

    ‘78 3.0 died with blower?

    New to me yesterday. Manufacturer’s cosmetic restoration with new wiring harness, starter, alternator, all tune items. Outdrive and engine removed for restoration. Outdrive gone through. The motor died several times today after restarts with the blower on. The blower died too and then restarted...
  13. Tycer

    How to replace a 9teen windshield.

    Aristocraft just posted a nice video of how to replace a Nineteen windshield. It’s on their Facebook page. https://m.facebook.com/pg/AristoCraftBoats/videos/?__nodl&ref=m.facebook.com&mt_nav=0
  14. Tycer

    ‘01 Yam F25+703 cntrl +dwell/tach?

    Hi all, I want to check prop/wot this week. Can I use my old dwell/tach by connecting the black to 703 black and red to 703 green? If no, do you have a test tach suggestion I could pick up at an auto parts store? 2001 Yamaha four stroke 1957 15’ wooden lapstrake runabout
  15. Tycer

    Our ”new” Nineteen

    We drove down to A/C in Dawsonville and plunked down our deposit. Very excited! We’ve been smitten by the Nineteens since we saw Bill Turner’s at the Lake Lure ACBS boat show this year. ETA is September 20. 1979 140hp. Not keeping the original colors. My wife got to choose. It’s her boat. Mine’s...
  16. Tycer

    9-teen speaker locations?

    Can y’all post pics of where you mounted your stereo speakers? Would you change it? How many watts rms are you running? Is it enough while cruising? Kind regards, Tycer
  17. Tycer

    Merc 140 motor/470 outdrive?

    Hi all, Didn’t find anything under advanced search on this. We put a down payment today to have Aristocraft restore one of their Nineteens for us. The hull we chose is a ‘79 and has the 140hp/181cid engine and a 470 outdrive. As I write this I realize I should have Scott take pictures of the...
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