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  1. Scott06

    2012 3.0L TKS runs great with muffs, but slow on lake...

    usually the fuel line is 3/8" double flare like brake lines would think you can get a coupler and a short section of line cut in half & use some 3/8 ID hose to splice in your T for the gauge The TKS uses an enrichment module (valve) to richen the fuel mixture until the engine warms up, it...
  2. Scott06

    2012 3.0L TKS runs great with muffs, but slow on lake...

    At this point I would test the fuel pressure on the water at the rpm where you feel like you are hitting the wall where it should be doing better. if the float wasnt cracked its probably all right. Mikes carbs had at one time brass floats for mercarbs not sure if TKS is the same thing. the 3...
  3. Scott06

    1997 Mercruiser 4.3 LX not running steady steady at idle or higher RPM's

    Yes the advance knob should compensate so the light hits on the tdc mark -say you want 8 deg BTDC set the knob to 8 should offset the light to flash on the tdc mark. Also can be used to test total advance which is also important
  4. Scott06

    28' Pontoon with 3.0 Mercruiser Prop

    Google prop slip calculator you put in pitch rpm and mph it compute % slip
  5. Scott06

    2012 3.0L TKS runs great with muffs, but slow on lake...

    I saw new fuel pump but was fuel pump pressure measured under load ? my other hobby is old cars - its a chronic issue with mechanical fuel pumps these days - the pressure output is all over the place, even on what was historically considered good brands
  6. Scott06

    Stupid me, no oil

    I think I had to buy longer ones and cut them down a 1/4" or so When I bought it a few years back it was about $100 stainless is the same price as the old anoidized Al https://www.hardin-marine.com/p-104396-o2-spacer-stainless-steel-for-stock-mercury-exhaust-with-wet-joint-riser.aspx
  7. Scott06

    Stupid me, no oil

    Ill have to check mine out this year. I'm in fresh but I would have expected it to hold up better
  8. Scott06

    Carb tuning

    yes some of the factory webber carbs used 3 step metering rods not sure which engines etc but there were a few. Can only think it shows that the binary rich/lean didnt work that well. I found the pump rod linkage slop when I put the AFR meter on. I never would have found it unless I had the...
  9. Scott06

    2012 3.0L TKS runs great with muffs, but slow on lake...

    I used simple green in an u on my friends holley off his Volvo penta , cleaned it and didn’t strip the finish. Simple green is what edlebrock recommends for its marine finish to not strip the gold Finish off.
  10. Scott06

    2012 3.0L TKS runs great with muffs, but slow on lake...

    the idle mix screws wont make any difference how it runs at higher rpm , just indicative that something was off if it ran best that many screws out.
  11. Scott06

    Carb tuning

    there have been a few threads - I think in this one two guys ended up wit the same tune on a vortec 4.3 ... https://forums.iboats.com/threads/stumbling-edelbrock-1409-4-3l-v6.670697/page-2 another one https://forums.iboats.com/threads/edelbrock-1409-2114-on-stock-4-3l-vortec-engine.600582/...
  12. Scott06

    2012 3.0L TKS runs great with muffs, but slow on lake...

    Correct no points or condenser in a delco est. If you are getting a good spark that jumps 1/4" gap or so then no the coil is not the issue Have you checked the tach vs a known shop tach? And you are getting a total advance of say 25-28 at 2500 rpm or so? If that is correct then I might go...
  13. Scott06

    Help with early 80s mercruiser 140hp

    Id start with a few basics use a spark gap tester to make sure your spark can jump a 1/4” gap or more. If the fuel pump was over flowing quite possible the plugs are fouled. Maybe turn the idle speed screw in / up a bit, fatten the idle mix up a hair. Leave the distributor loose so you can turn...
  14. Scott06

    Loud Rattle On Startup

    is the starter gear retracting or getting hung up? Any rocks or debris in the pump or trapped in the nozzle?
  15. Scott06

    End of Season oil changes?

    This- if there's any water in the drive or leaks you got all winter to fix it. If you do this the engine and drive will outlast the boat
  16. Scott06

    73 starcraft old merc to new merc

    I think minor cutting of the keyhole on the top corners is required. Nothing major or to worry about. Might be for the swing of the steering arm? thread below is about it https://forums.iboats.com/threads/mercruiser-engine-and-outdrive-replacement-keyhole-size.620343/ If you like and want to...
  17. Scott06

    Mercruiser Setting Timing on 3.0L

    you might be better off if the boat is on a trailer to take it to the machine shop and see if they have a machinist rule to look at the block.
  18. Scott06

    Freeze plug part number

    Have never seen the core plug for manifolds sold separately. you will likely have an easier time going to the auto parts store and getting a freeze plug based on OD. you can also use a rubber expansion plug if there is enough room between inside and outside of manifold. Did the manifold freeze...
  19. Scott06

    Mercruiser Setting Timing on 3.0L

    could be cant tell from the pics if the block surface is eroded or not. As mentioned below you need a long machinist flat bar to check the whole surface. You can put dykem or machinists dye on the block surface and sand with long sand block to see if the block is fire slotted- the dye will stay...
  20. Scott06

    1997 Mercruiser 4.3 LX not running steady steady at idle or higher RPM's

    get an ulntrasonic. well worth it. I did my buddies Holley 2 bbl off his VP a couple years back, Engine had all the symptoms of needing a carb rebuild, but when I opened the carb it looked clean, soaked all the parts in the ultra sonic using simple green as I was trying not to strip the paint...
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