Search results

  1. B

    Question on tune-up of points ignition & wire/spark plug order

    I read through How To: Tune-up Your Points Ingition and the author is very insistent about making sure you do the wires one by one. I am unclear as to why. If I know my engine's firing order, and I know where the rotor is pointing, and cylinder 1 is just before top dead center, I can make sure...
  2. B

    Correct RPM for setting timing on muffs

    I'm going to set the timing on my 3.0L using water muffs. It's supposed to be at 8 deg. BTDC but not sure what RPM that's supposed to be at. Manual says idle is 650-700 RPM in forward gear but idle will be higher on muffs, so does that mean I should set timing slightly earlier than 8?
  3. B

    Replaced temperature sender and water ran out

    I'm assuming this is entirely normal but I'm really not sure. Boat hasn't run in a couple of weeks. Took the old temperature sender off of the 3.0L engine and water ran out of the hole for a bit. Is that expected?
  4. B

    Cleaning gas tank?

    I'll try to get out there today and poke around and see what I can find and take some photos. Thank you.
  5. B

    Cleaning gas tank?

    I don't know where the sending unit is. I'll see if I can find out.
  6. B

    Cleaning gas tank?

    Thanks, I just installed a fuel water separator. I assume that's what you're referring to. I'll do that thanks.
  7. B

    Cleaning gas tank?

    I have a '91 Larson All American and I'm trying to determine what the fuel tank is made of - is it possible for it to have rust inside of it, and also how to tell if it needs to be cleaned out, and if so how to actually clean it. I can connect a hose to the gas line and siphon out the gas...
  8. B

    Upgrade from prestolite to pertronix or replace dist. with delco voyager

    I think in the interest of not spending more money I'm going to stick with points at least until next year - my question for you is about setting dwell. I bought a dwell meter. Can I set dwell and do timing on muffs?
  9. B

    Mercruiser 3.0 140 shakes at idle and bogs on acceleration. New Carb?

    Sorry to resurrect an old thread - how would I find the bushings for my old prestolite distributor? It's an IBM 7026 and I can't seem to find parts for it.
  10. B

    Upgrade from prestolite to pertronix or replace dist. with delco voyager

    yeah that's a possibility.. :)
  11. B

    Upgrade from prestolite to pertronix or replace dist. with delco voyager

    Possibly a dumb question - I have a prestolite points distributor on my 3.0L. I can upgrade it to use pertronix ignitor and replace the coil with a flame thrower, or I can spend about $70 more and replace the entire distributor with a delco voyager unit...
  12. B

    Recommend aftermarket carb for Merc 3.0L

    I have not tried rebuilding it. I'm not sure I want to try doing it myself and paying someone is almost as much $ as just buying a new one. My 3.0L is hard to start, needs me to baby the throttle for a while until it will idle by itself without dying, idles rough, rocks side to side, smooths...
  13. B

    Recommend aftermarket carb for Merc 3.0L

    I'm looking at either the Sierra 18-7370N, or one from National Carbuertors out of Jacksonville, FL. Wondering if anyone has experience with either, or what you all would recommend.
  14. B

    Spark plug gap difference

    Yes my 3.0 takes too long to start, requires me to nurse throttle for a while before it will idle without dying, and idles rough, shaking side to side. Smooths out if I increase throttle. I'm replacing the points with pertronix and the coil with a flame thrower, new cap and rotor, I installed...
  15. B

    Spark plug gap difference

    This is where I found that I could use the ones I have now https://www.sparkplug-crossreference.com/convert/AC_DELCO/MR43T
  16. B

    Spark plug gap difference

    I had thought about doing iridium. Never used them before, but sounds like they can't be gapped?
  17. B

    Spark plug gap difference

    The cover on the carb flame arrestor has all the information about the engine including spark plugs which it says should be "AC-MR43T". When I went to buy these, the store didn't have them and I don't recall specifically but somehow I landed on the NGK BR6FS plugs as being compatible.
  18. B

    Spark plug gap difference

    The spark plugs I'm using for my 3.0L have a 0.031" gap. The engine specs call for 0.035" gap. Is that tiny difference going to matter?
  19. B

    Recommend a dwell meter

    Wondering what dwell meter you recommend. Reading reviews it seems as though some of the digital ones aren't always consistent.
  20. B

    Setting base timing on Prestolite distributor

    Good morning, I want to check/set the timing on my Mercruiser 3.0L. It has the conventional ignition (as opposed to EST). The distributor is Prestolite IBM 7026. The videos I have found on YouTube all show EST distributors and they have a shunt at the base of the distributor where you jump...
Top