Search results

  1. Scott06

    1989 5.7 350 Mercruiser ignition replacement help - possible upgrade to DUI unit

    X2 on the delco its an OEM quality complete set up, the usual go to for replacing merc unique part$. It is capable of working with the shift interrupt and common enough that any reasonably talented mechanic should know how to service it vs the less common DUI. Also has total timing of 25 so...
  2. Scott06

    Mercruiser 5,7 speed

    If your WOT rpm is accurate you need to reduce prop pitch or you have an engine issue. Did it ever get more speed ? Was the drive replace with a different ratio? Agree start with compression test and look at basic tune up items
  3. Scott06

    Rochester 2 jet running rich before and after rebuild

    I would look in the throttle bores at idle and see if you see any fuel dribbling down off the boosters above the throttle plates should be dry at idle. Did you by chance replace the needle screws that control idle mixture ? Could be wrong screws? Or were damaged original ones reused? If you are...
  4. Scott06

    Mercruiser 140 Points to Delco EST results in low RPM at WOT

    I would check the plugs to see if you are lean as well.
  5. Scott06

    Rochester 2 jet running rich before and after rebuild

    Measure fuel pressure …
  6. Scott06

    3.0 GS - Overheat followed by power steering pump belt snap

    They would’ve had to have taken the power steering belt off to change the alternator belt so they probably didn’t tighten it up enough
  7. Scott06

    3.0 engine alignment

    Front engine needs to go down not up to get more witness marks on the top of the tool I don’t know if it’s the same for three point no but on my five point no the side mounts are an inch and 1/16th or an inch and 1/8 th I can’t remember offhand If your seat back is like mine it may have a...
  8. Scott06

    Rochester 2 jet running rich before and after rebuild

    What your fuel pressure?i assume you mean the vent for the fuel bowl? There is no vent for power piston you can see, it gets pulled up by manifold vacuum. If you see fuel on the top of float bowl your fuel pressure is too high overcoming the needle and seat, or the needle and seat/ float...
  9. Scott06

    Alpha One Gen 2 impeller delete question

    This is the correct way to install a fresh water system on an alpha. to the OP before you hang anyone, look and see if there is room, and if that will be any easier to change. Some of the comments folks have made about the contortions they need to do to change a belt or crank pump makes me...
  10. Scott06

    Water in Engine

    Agree with ted i would be verifying there are no leaks On exhuast manifolds elbows and risers . I would think based off your comments it hydro locked while they were swimming. other thing pressure test cooling system if you dont find issue with exhaust. now that you have it running make sure...
  11. Scott06

    Best piston for gen 2 4.3 mercuiser

    Agree with other coments regarding machining and piston profile . did you remove the drive and see if the engine is siezed or drive, gimbal bearing, ujoints?
  12. Scott06

    Oil change on TKS 3.0.

    when I repowered. I changed the oil after 1 hr, then at 10 hrs, then at end of season per my normal routine. Maybe be over kill but oil changes are cheap and you can see if metal particles are in the oil
  13. Scott06

    Volvo Penta SX Prop ID

    Yeah i know you dont like 4 blades…. both the enertia and rev 4 played very well at high trim levels , if i recall the enertia could trim almost all the way up. the rev 4 as you are going faster you can keep adding trim up, if you slow down and are still trimmed out and then punch it it will...
  14. Scott06

    Volvo Penta SX Prop ID

    Any time. the key is to match your boat and how you like to use it to a prop. I forgot you are running a 21 now not a 19" so likely 20" 4 blade would be ok. I think the props will fit but you might need a different hub kit or thrust washer , would really depend on the prop. Best bet to get the...
  15. Scott06

    Volvo Penta SX Prop ID

    Yes and no... First time I used a 4 blade (old boat- '91 17 ft Sea ray 170/3.0L) Went from 17" or 19" (skiing/Cruising) Black Max to a 16" or 18" (again skiing or cruising) Michigan Vortex 4 blade (aluminum). Lower pitch ski props aside, Boat was better in every performance parameter except top...
  16. Scott06

    Prop advice needed

    Fix your tach or verify correct WOT before playing with props. Obviously 19" is too much pitch and you are lugging the engine. If 4400 was indeed accurate you should be going down in pitch not up A 4 blade will help with stern lift, hole shot, and lower planning speed. Props are trade offs if...
  17. Scott06

    Mercruiser 3.0 No Spark issues

    Yeah but you gotta keep watching…
  18. Scott06

    Volvo Penta SX Prop ID

    If those are accurate you are propped correctly. I think the VP ss props are fairly decent. I personally prefer 4 blades as loaded watersports is my typical use , i would drop down in pitch if you go four blade nothing wrong with being bale to tap the rev limiter lightly loaded, better off...
  19. Scott06

    Mercruiser 3.0 No Spark issues

    given that you suspect a rotten transom and you have been flex testing it by jumping up and down i suspect you have your answer… i would be drill testing the transom if you haven’t. Hard to tell from the keyboard how bad it is
  20. Scott06

    Mercruiser 3.0 - Electric and starting problems

    Ricks right start with some basic maintenance. Likely you have ab electrical problem possibly related to the second battery and switch, which may have not been installed correctly. When it died on the water it tripped the 50 amp breaker which kills power to the engine and the helm. There is...
Top