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  1. Scott06

    mercruiser 4.3 thermostat housing

    i in the applications part 18-8835-1 fits Delco EST and YEMS distributors where 18-8810-1 looks to fit both Delco EST and Thunderbolt distributors. One would think there is some sort of difference if they are making two parts numbers. Do you know what distributor you have ? if you take a...
  2. Scott06

    Need Help & Advice on a Purchase....

    Guys we are getting off topic and not really helping the OP.
  3. Scott06

    How much Prop should i try?

    This is same situation I ran into with my repower. Boat wasn't running as it was sold as handymans special. If the boat manufacturer sold that boat with the 5.7 300 hp see what prop they would put on it. Sea Ray published that in their parts book. I started out with the existing prop (19"...
  4. Scott06

    Need Help & Advice on a Purchase....

  5. Scott06

    Need Help & Advice on a Purchase....

    this . They are both 5.0 in relatively big boats. I think my good friend has the same crownline very nice boat But he has the 300 hp 350 mag and I think it is under powered. not trying to dissuade u as i commend having a price range just be realistic about it. We have a 21 ft with a 5.0 which is...
  6. Scott06

    Alpha 1 Gen 1 Upper Unit Hex Bolt Connecting Halves Broke Off

    put perfect seal/permatex #3 on the threads when you go back in keeps them from locking up. you wont blast a hole in the upper trying to weld- use a thick washer or nut weld on the inside of the nut or hole in washer to the bolt , weld the nut to the washer etc. you will be amazed how this...
  7. Scott06

    Alpha 1 Gen 1 Upper Unit Hex Bolt Connecting Halves Broke Off

    if the portion left is up on the surface usually I weld a nut to it and can get it off. Of course this only works if you have access to a mig or tig welder or welding shop. Usually the heat welding it helps loosen it up. if you can thread the nut on whats left and tack it on If you can get...
  8. Scott06

    Pitch perfect

    you hear hit and miss things about TP (at least from the dock chair experts here...) I have had decent luck with the Vortex 4 blades on my previous boat. they are a good value and for me were a great way to cut my teeth prop selecting with out breaking the bank. The vortex doesnt have a ton of...
  9. Scott06

    Pitch perfect

    The cowling looks great... Where does the cav plate sit in relation to the water when at speed and the engine pod bottom when fully trimmed in
  10. Scott06

    How much Prop should i try?

    I did a similar repower went from a 190 hp 4.3 to a 260 hp 5.0 on a sea ray 200 sport. Kept the 1.81 V6 drive . Boat had a 19” vengance on it. Found going up 2” in pitch was roughly equivalent to one step in drive ratio as with a 5.0 my boat would have come with a 1.62 drive witha 5.0. what wot...
  11. Scott06

    Carter P4389 Doesn't Work when Connected to Carburetor

    By needle valves do you mean needle and seat that is connected to floats , and have to take the carb top off to get a. or needle valves as in the idle mix screws on base of carb stick up at a 45 deg angle ? if you dump a little gas down carb bores does the engine start briefly? You want to...
  12. Scott06

    Spray of water from exhaust manifold above O2 sensor

    While you can weld cast iron with tig and the correct rod it is hit and miss And requires preheating and cool down of the part before and after welding. the most honest answer a welder can give you is I will try but make no gauarantee.… it is also double wall. Better way to repair castings is...
  13. Scott06

    Spray of water from exhaust manifold above O2 sensor

    Probably cracked Looks like a pin hole near. I would dissasemble and use acetone or pressure test to see what's is going on. Are they made of aluminum or cast iron. Aluminum could probably be repaired but cast iron not so much
  14. Scott06

    bogging down after 5mins

    Additionally you can always run it off a remote tank to verify it is an issue with fuel system supply. As mentioned above that's what it would seem to be. Did it ever run ok with the new carb? often if fuel system is contaminated you will just pollute the new or rebuilt carb.
  15. Scott06

    Is my gimbal bearing sealed or greaseable

    to me that means the grease holes are not lined up and you are not greasing the bearing. Grease should be coming out around the shielding on the bearing. Run it till it starts making noise then replace it with a permalube or a properly placed greaseable aftermarket bearing. they groan when...
  16. Scott06

    Pitch perfect

    I might try a different 4 blade than the spitfire. On my 21 ft bow rider I got a ton of slip with the spitfire. It was pretty disappointing compared to the sales schtick. would also verify motor is low enough doesnt sound like it is - do you have a pic of the motor trimmed all the way down
  17. Scott06

    Have spark and fuel, can't get the rebuilt engine to start

    is he using the correct bank for cyl 1 . If I recall last cyl in firing order is 2 then dizzy goes back to 1- which sort of matches the offset to where it kind of runs?
  18. Scott06

    Have spark and fuel, can't get the rebuilt engine to start

    yes I could see it. it looks good but its a video shot in the dark obvious blueish white spark jumping a good size gap and snaping noise. Seems to be in decent time but also seems battery is weak
  19. Scott06

    Bellows replacement

    for all I have read about it here and other forums have not had an issue. my family has had a cottage in a shallow cove since the early 60s and the 3 I/O boats we have had have been 33, 25, and 20 years old. the greaseable u-joints in my '91 made it 23 years, the non greaseable in my current...
  20. Scott06

    Have spark and fuel, can't get the rebuilt engine to start

    more for if the valves are adjusted correctly. Common mistake can be to overtighten nuts on rockers arms, valves don't close. Have also heard that if one intake hangs open can prevent firing but never seen it myself. To the op might be worth checking the rockers on those low cylinder...
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