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  1. jimmbo

    1977 140 carb replacement

    You really don't have a lot of Options, as these are Marine Carbs. Don't get any Ideas of sticking on an auto/truck Carb in its place
  2. jimmbo

    VP 4.3GS Carb Tuning Vacuum Port?

    You could do that, the reading on the Gauge will be lower, but it can be used, for tuning
  3. jimmbo

    1977 140 carb replacement

    $345 https://www.marinecarburetors.com/products/marine-carburetor-2bbl-rochester-2gc-4-cyl-mercruiser-1351-5203a1-electric-choke
  4. jimmbo

    VP 4.3GS Carb Tuning Vacuum Port?

    The 4160 does use an internal Vacuum Passage to get Vacuum to the Pulloff.
  5. jimmbo

    1977 140 carb replacement

    You can can try a Universal Marine Carb from Holley, it will likely need some Tuning, and some Adapters to fit it in place of the Rochester. https://www.holley.com/products/marine_and_powersports/marine/marine_carburetors/parts/0-80320-1 It is the Smallest carb Holley offers, and is likely still...
  6. jimmbo

    1971? Mercury 650 Lightning Outboard issues

    In that Day and Age the Serial Number would have been located just above the Tilt Tube, on the Yoke. It should also be on an Aluminium Plug, stuck in the Engine Block
  7. jimmbo

    1971? Mercury 650 Lightning Outboard issues

    That looks like a 68 or 69 Engine Cowl wrap, not a 71 The engine likely overheated at some point and some covers warped a bit and are now leaking. It is also missing a few Parts
  8. jimmbo

    Trouble coming on plane

    Welcome to iboats How long has this "trouble coming on Plane" been happening?
  9. jimmbo

    VP 4.3GS Carb Tuning Vacuum Port?

    I prefer to leave the PCV in place as it is providing a mix of Air and some Hydrocarbons, which need to be taken into Account when doing the Mixture Adjustment. Adjust the Mixture for the Highest Manifold Vacuum, not a Specific Vacuum Value.
  10. jimmbo

    VP 4.3GS Carb Tuning Vacuum Port?

    I unhook the Vacuum Hose from the Choke Pulloff, as the Choke is fully open from Heat, and hook up my Vacuum Gauge to that hose
  11. jimmbo

    About peeing and also motor heat

    You can throw that plastic plug away, it is not water tight, that area fills with water instantly
  12. jimmbo

    About peeing and also motor heat

    Are referring to this hole(red arrow) That is just access to a bolt A strong Stream from the Pisser, only means that at that Instance the Pump is still pumping. If the Impeller is more than a couple of Years old, well you are gambling
  13. jimmbo

    Trailer driving lights do not work, what I've done so far...

    Follow the Wires from the Connector back Check the 7 pin Connector for Power when the Tail/Running Lights are on. Perhaps the Wire is on the Pin for you Adapter to work Worse comes to Worst, you can always, splice into the wire that feeds the Tail Lights.
  14. jimmbo

    Single Person Loader?

    Buick Roadmaster, has a Factory Trailer Option good for 5000lbs. I also have a 95 Caddy(12,000 on the Odometer) that has that Option, good for 7000lb. I hate Trucks, the seats are very Uncomfortable. Cadillacs used to have Nice Seats, not anymore
  15. jimmbo

    Single Person Loader?

    Many people relying on an Auto Latch, have ended up Smashing into the Winch Stand, resulting in bent Stands and/or damaged Boats. By not backing in too deep, the Bunks will provide Stoppage a foot or two shy of the Stand, and will prevent it from backing off. Roller Trailers, are best loaded...
  16. jimmbo

    About peeing and also motor heat

    A 4 cylinder would likely be the 44 cu in crossflow that Mercury introduced in the mid-late 1950s. It wouldn't have a Thermostat Any engine that sits for any period of time without being prepped for a Sleep is likely to have Fuel Issues upon reawakening. Also a new Water Pump Impeller should...
  17. jimmbo

    Single Person Loader?

    Here is my single Person Loader System. Has worked every time
  18. jimmbo

    Trailer driving lights do not work, what I've done so far...

    To the Tail Lights work on the Tow Vehicle? If they do, could be a Misswired Connector on the Tow Vehicle, or a Broken wire to the Connector
  19. jimmbo

    Stupid Question from New Member

    Mercury Part #s Rotor 8M6001251 Cap 393-9459Q1 Sierra Rotor 18-5418 Cap 18-5385 FT beat me by a few seconds
  20. jimmbo

    Volvo Penta 5.7GLPWTR - Oil Brands

    Vovo specs a Full Synthetic, and Mercury offers Blends and Mineral Oil. The one you link to is Mineral Oil. I know people will be crowing about how Brand X car/truck Oil is no different. However, a Marine Engine operates in a different Operational Environment, and places different Demands on...
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