Search results

  1. R

    Runs great on muffs but not in lake

    Yeah I'll be back on water Thursday most likely so hope to get it sorted out
  2. R

    Runs great on muffs but not in lake

    I wouldn't rule it out at this point I'm going to change the water separator filter today and when I go back to the lake this weekend to try and tune it on the water I'm also going to bring a fuel jug from an outboard motor that I'm going to plumb directly to the fuel pump to rule out that...
  3. R

    Runs great on muffs but not in lake

    Yup.. Just going to focus on Carb if fuel delivery from tank is ruled out.. Only thing it cab be at this point Timing is set Valves set Motor is fresh Cap/rotor wires look fine and pretty new Just being how smooth and clean it runs on muffs it seems like it's got to be minor adjustments... I...
  4. R

    Runs great on muffs but not in lake

    Yeah that's a good suggestion I already had the drive off and the exhaust pipe flange it is a all clear
  5. R

    Runs great on muffs but not in lake

    I do not have an exhaust shutter valve on my exhaust pipe and when the issue occurred when I had it in the water the transom straps were off and I was even out in the middle of the lake when it died the only reason I'm thinking exhaust back pressure is because it runs fine on the muffs with no...
  6. R

    Runs great on muffs but not in lake

    I'm pretty sure I would know if it's running on two cylinders on the muffs , it was converted to electronic ignition by the previous owner it has a pertronics igniter on it
  7. R

    Runs great on muffs but not in lake

    Interesting... I don't know since it runs great on muffs then dies on the lake I'd assume to opposite it would need more fuel with the water back pressure I couldn't see it wanting leaned up but when I go back to lake I'll see if That makes a difference.
  8. R

    Runs great on muffs but not in lake

    I guess I can crank a turn in the throttle screw to see if I can get it to light. I couldn't get it to remotely stay alive in the water the other day. It would catch and bog then die... Both mixture screws set about 1.75-2 turns out timing at 6-8* per sticker on valve cover.
  9. R

    Runs great on muffs but not in lake

    its been raining so I took the time to pull motor back out to source a leak i had, going to test my leak repair and then put motor back in and head to lake for some on the water tuning. The carb has a sierra marine tag on it and the previous owner stated it was new from them, but I obviously...
  10. R

    Runs great on muffs but not in lake

    Not sure on pressure, I'll have to get a gauge on it.. It has a vent because I overfilled tank and it spilled out. Then I'm not sure what an anti siphon valve is... Also how the difference between hose water and lake affects it
  11. R

    Runs great on muffs but not in lake

    Mercruiser 3.0 that I bought as a project. I rebuilt the engine and have it running great in the driveway on the hose with the muffs on however when I get to the lake and put it in the water it stumbles and dies and will not start back up. Timing is set at the sticker on the valve cover which...
  12. R

    Newer 3.0L in place of an Older 3.0 QUESTIONS

    where are you sourcing a set of sleeves?
  13. R

    Newer 3.0L in place of an Older 3.0 QUESTIONS

    well i see on michigan motorz that they sell the 12-3/4 flywheel for this purpose like the link above shows and then the coupler id have to decide which one... just didnt want to spend 450 on a flywheel and probably 200 on coupler.. not sure if there were other options to save the money. its a...
  14. R

    Newer 3.0L in place of an Older 3.0 QUESTIONS

    that would be great but this boat aint worth that at at all.. so pretty much im stuck buying a flywheel and coupler to fit this engine into my older bellhousing so it will bolt in place and the coupler will work with my current mc1 driveshaft
  15. R

    Newer 3.0L in place of an Older 3.0 QUESTIONS

    so id be able to use my bellhousing and I just have to buy the coupler? I was under the impression that you needed to run a smaller flywheel to fit into the older boat bellhousing?
  16. R

    Newer 3.0L in place of an Older 3.0 QUESTIONS

    I have a project boat that is a 79 and has the 2 piece seal 3.0l 140hp engine. The engine has some cylinder wear and thought I would be able to get away with a set of pistons but noticed its bore is 4.040 and it looks like the service limit is 4.050 and I wont be able to bore it to 4.060 i guess...
Top