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  1. Striper Blues

    460 King Cobra Fuel Pump

    I've been chasing a fuel problem on my Grady which just got a repowered with a new long block, but some old assessories, eg. fuel pump. Long story short, It starves for fuel and will stall after warming up. I've checked tank venting, replaced carb, fuel lines, new filter/separater and today a...
  2. Striper Blues

    Anti Siphon Valve - 460 King Cobra

    I've got a 1989 Grady 25' Sailfish with the 460 I/O. Any ideas on what type of anti-siphon setup I have. Are these standard fittings/valves? I'm experiencing some kind of fuel starvation after the engine warms up plenty. Just repowered, new carb filters, I check the fuel vent, everthing is...
  3. Striper Blues

    Installing an hour meter on 460 Ford King Cobra

    Being that i have a new long block, I bought an hour meter to track time. How do I wire this in so it only runs when motor runs? Seems an accessory connect would rack up time when the key was on and not just when the engine was on. <br /><br />Thanks again,<br />Pat
  4. Striper Blues

    What weight oil should I use on my 460 King Cobra

    I just had a new long block installed and the mechanic recommended 25-40 weight. Sounds thick but I'm guessing these big engines work hard... Any one back this up or have another suggestion?<br /><br />thanks,<br />Pat
  5. Striper Blues

    Prop Question

    I'm considering installing a stainless steel prop on my 1989 Grady White sailfish with a 460 ford/king cobra setup.<br /><br />I checked with GW and they told me it takes a 15X17 which is what it has now only in aluminum.<br /><br />What are the pros/cons of changing to a 15X17 stainless...
  6. Striper Blues

    What size prop should I use

    on a 1989 25' grady white sailfish with a 460 ford King Cobra stern drive?<br /><br />I'm told 15x17, is that 15"diameter and 17" pitch?<br /><br />someone suggested going to a 15x15 how would that change performance?<br /><br />thanks,<br />Pat
  7. Striper Blues

    sheared impeller shaft

    Yikes, I thought I finally had my 3.0L OMC cobra running smoothly when another disaster. I was out on the water and the engine started pinging, I looked down to see that it had overheated. I shut it down checked around and finally found that the shaft that drives the impeller pump on the out...
  8. Striper Blues

    sheard impeller shaft

    Yikes, I thought I finally had my 3.0L OMC cobra running smoothly when another disaster. I was out on the water and the engine started pinging, I looked down to see that it had overheated. I shut it down checked around and finally found that the shaft that drives the impeller pump on the out...
  9. Striper Blues

    Carb question, Rochester 2bbl

    I'm having a problem where after the engine gets good and hot it starts to stutter a bit. Someone suggested the carb is heating up and causing vapor lock. I recently replaced the carb and the gasket was a lot thinner on the new one. The old gasket was about a quarter inch thick, but falling...
  10. Striper Blues

    Engine runs shakey when hot

    3L OMC runs great at idle and no problem up to crusing speeds for about 15 or 30 minutes then it starts some kind of slight, erratic skipping. I'm not talking running out of gas bogging here, I'm talking intermittent skipping. I have new, plugs, wires, cap, rotor, condenser, points, carburator...
  11. Striper Blues

    3.0 OMC Stutters after running at load

    How you guys been? I'm back of course with latest adventure. 3L OMC runs great at idle and no problem up to crusing speeds for about 5 minutes then it starts some kind of slight, erratic electrical skipping. I'm not talking running out of gas bogging here, I'm talking intermittent skipping...
  12. Striper Blues

    3.0L OMC Cobra - rough at low end, pinging at high end

    Here I go again, different issue. LOW END PROBLEM - I thought I had a timing problem but after several attempts I learned that I have one cylinder that doesn't seem to be firing properly. When I pull the plug wire off one cylinder at a time three of the four drop the rpms significantly the...
  13. Striper Blues

    Setting timing on OMC Cobra 3.0L

    My manual says to set time at TDC when idling in forward gear at 600 RPM. Well thats hard to do on the muffs in the driveway.... 600rpm sounds awfully low also...??<br /><br />What should the idle be in neutral and what should the timing be set to in at this RPM? timing advances with rpm so...
  14. Striper Blues

    1988 3.0L OMC Cobra bogs on acceleration

    Hey folks,<br />I just put a rebuilt carb on my 3L OMC Cobra and when I hit the throttle to accelerate it bogs way down, sometimes stalls. If I push throttle forward more gradually it accelerates normally. I have just tuned her up and everything else is right on, I rechecked timing and...
  15. Striper Blues

    OMC Gasket Sealer on Impeller Pump housing seal?

    My repair manual says I should use omc gasket sealer on both sides of the impeller plate. I can understand putting it on the gasket side but should I put it on the side that the seal from the plastic pump housing sits on? It looks like the boat shop put red rtv on the seal itself. I would...
  16. Striper Blues

    Exhaust Flappers

    Anyone out there know anything about the exhaust flapper(s) used in a 3.0L OMC Cobra?<br /><br />I'm told there are "rubber" flappers. I only see one metal flapper right at the top of the exhaust pipe, but nothing anywhere on the boat or in the manufactures part catalog.<br /><br />Is it common...
  17. Striper Blues

    OMC 3.0L Cobra Exhaust Question

    I am told by my local mechanic that there are two rubber flapper seals in exhaust bellow (or hose?)on this engine to prevent water from backing up exhaust side. The problem I'm having is identifying/locating these things. I don't see any such thing in my factory parts catalog. I do see an...
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