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  1. carolynrose

    Propeller Change Thought

    I'm researching for the purpose of a prop change. My OMC Stainless steel prop that was 15 x 15 repitched to 13 is now in need of replacement due to severe cavitation scoring. It worked well for a couple of years but now is done. Boat specs are: 1988 Bayliner 2556 Convertible, 5.7 OMC, listed...
  2. carolynrose

    Weird overheating problem

    1988 5.7. This is very weird. The boat runs great and never goes over175F. Except if I have to take it out for maintenance or winter storage. I recently replaced the lower gear case and had it all apart so I know the pickup tube and seals are good and put in a new water pump. Had the bell...
  3. carolynrose

    Shifter Cable Travel

    I am looking into changing my throttle/shifter control assembly. How do you know if there is enough travel on the control to correctly operate the gear changes. I cannot locate the original shifter # or brand for my boat. It is a 1988 Bayliner 2556 with a 5.7 OMC and has two stations.
  4. carolynrose

    Prop Recommendation

    Boat is a Bayliner 2556 with a 5.7 and a cobra outdrive. I am currently running an aluminum 4 blade prop with a 13 inch pitch. The boat has been refitted with 12 x 24 trim tabs to get it on plane early. At about 3100rpms it's on plane and running 15 - 17 mph. So far, so good. Problem is it...
  5. carolynrose

    Riser Temperatures

    1988 OMC Cobra 5.7, last year I replaced the old log style factory manifolds and risers with OSCO centerise 3'' exhaust. I thought the engine lost a little power so this year I switched the risers to 4". The power did seem to come up a little and the engine temperature definitely dropped a few...
  6. carolynrose

    Closed system cooling

    I'm replacing my exhaust this spring with a new center rise aftermarket conversion kit. I currently have a log style exhaust on my OMC 260 (Chev 350) in a 1988 Bayliner. The engine has closed system cooling, raw water exhaust cooling. Is there an advantage to including the exhaust manifold...
  7. carolynrose

    Exhaust Again

    I know this kind of post has been discussed before but here goes. I'm shopping for new exhaust for my 1988 Bayliner 2556 with an OMC 260. I posted before about converting to center rise exhaust and everyone pretty much agreed it was a good idea. So with this in mind I've noticed serveral...
  8. carolynrose

    Exhaust Shutter

    I know this subject has already been hashed over, but I had some thoughts I thought I'd throw out there. My boat is a 1988 Bayliner Ciera Convertible with a 260hp OMC sterndrive. This past summer I had a hydrolock while docking into a hard current and wind. I hope to avoid this again. Here is...
  9. carolynrose

    Upgrade exhaust manifold?

    When we pulled the boat last week I took the manifolds and risers off for a look see. They are questionable so I'm going to replace them. The question is: I've seen a kit that allows an "upgrade" from the 1988 OMC 5.7 log type to the 1989 and up center riser type manifolds. To replace both...
  10. carolynrose

    Weird

    Was out in my boat today. 1988 Trophy 2556, OMC 350. Ran good, put about 15 miles on it I was docking in reverse when the motor stalled. I couldn't get it started. When we checked it the motor was locked up. Both front cylinders on both banks were full of seawater. Pulled out all the...
  11. carolynrose

    hwsiii

    Well I finally got out today. Ran the boat with the original 391536 prop. If you remember I had mentioned that this prop was pretty chipped up, so I ground off the edges and sanded them some. Into the wind and against the tide: 1400 rpms - 5.3 mph 2000 rpms - 7.7 mph 3000 rpms - 9.3 mph 3500...
  12. carolynrose

    hwsiii, hoping for #'s on Tuesday

    I'll be heading down Tuesday with a GPS Antenna that works. Hopefully I'll get some accurate #'s to post. I'm going to start with the 15 1/2 x 13 (391536) even though the rpm's seem to high. I also have a Vortex 15 1/4 x 15 Aluminum prop, but. I have been doing a lot of reading and...
  13. carolynrose

    hwsiii, you out there?

    Have you had a chance to review my results for the prop you recommended?
  14. carolynrose

    Test

    Picture
  15. carolynrose

    More Performance Possible?

    Boat: 1988 Bayliner 2556, Factory listed weight 5360lbs. Engine: OMC 350cu in 260 HP Outdrive: Factory Cobra w/GLM Lower Unit Factory Prop: 15 1/2 x 13 Aluminum by Michigan Current Prop 14 3/8 x 15 Stainless Prop by Solas WOT 4200 rpm at approx 24mph on GPS, under ideal conditions Now the...
  16. carolynrose

    Honest Opinion

    What do you guys feel about OMC Cobra? I have had two different boats with them. One was absolutely great. This one the jury is still out on. Had a brand new outdrive in it and had to send it back for warranty work. It seems ok now, but I hear a lot of bad things. The alternative is a...
  17. carolynrose

    OMC and Pertronix

    Thanks for the help so far. I have only one concern left. Again this boat is a Bayliner 2556 w/5.7(350). I have installed the Pertronix as per the original directions. I did the "diode fix". Made all necessary adjustments. Believe it or not everything works like it should and it shifts...
  18. carolynrose

    OMC and Pertronix

    Help me out someone. I am really close to sorting this thing out. I have discovered that the overstroke switch on an 88 OMC is normally closed and the interupter is normally open if that helps anyone out, it sure helped me fix mine. I have one issue left. If I put 12v+ to the + side of the...
  19. carolynrose

    Two OMC Questions

    1988 Bayliner 2556 w/5.7(350). I have installed the pertronix ignitor II and Ignitor II coil w/ the "diode fix". I am hooked to the resistor wire and not having problems at this time. But I see many posts on these boards that say it should be hooked to direct 12v. Any comments? Next...
  20. carolynrose

    Esa

    I have a 1988 Bayliner 2556 with a 5.7 (350) OMC. The outdrive is new as well as the cables. I have spent countless hours getting everything adjusted just so. Every once in a while when I attempt to shift out of gear the ESA does nothing. When this happens I can manually move the interupter...
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