Search results

  1. H

    leak from risers - 5.7L OMC

    1989 5.7L OMC Cobra I notices small drops coming out from where the riser sits on the manifold. This happens on both the right and left side. I noticed that this happens only in high RPMs and after i replaced the water circulating pump. I think the new pump creates bigger flow of water...
  2. H

    OMC Cobra 5.7 Steering System - service or replace?

    I Have an OMC Cobra 5.7 setup and I believe it has a power steering system. I would like to service my steering system so that it is smooth and responsive. I was unable to find any info on this system and was hoping to get some advice from you guys. I looked back at the steering cilinder and...
  3. H

    Affordable Diesel Power - is there such a thing?

    I was just looking at some Diesel engine options. Not that i need to repower but was just wondering whats out there. a new Mercruiser MPI motor with about 320HP will cost about $10,000 installed. A comparable Cummins Mercruiser diesel motor will cost about $30,000 installed. This doesnt...
  4. H

    main belt PULLEY - where to get one for OMC?

    I have a 5.7 350 chevy OMC motor. it has a main pulley that drives two belts, one going up to the alternator and the other going to the water pump i believe. My pulley still functions but its pretty corroded. I would like to replace it but dont know where to get one or even what the propper...
  5. H

    Running without exhaust bellow - problem?

    I just completed my SEI116 cobra conversion. Essentially converted my 1989 Cobra drive to an aftermarket Alpha One drive. conversion was easy to do, and a great investment IMO. So far i have 15-20 hours on the new drive and the boat runns better than ever. Happy customer here! While...
  6. H

    OMC 350 5.7 - What should the WOT RPM range be?

    1989 DOnzi 23 cuddy cabin with OMC 350 5.7. what is the manufacturer's recommended WOT RPM range? does anyone know? not sure where to find this info, but would like to know. thanks
  7. H

    Alpha One - what is this next to the shift rod

    I am in the process of installing the SEI conversion kit for CObra. The SEI116 is an exact copy of the Mercruiser Alpha One gen II. As i am installing everything I have no ideal what this is. Not something I had on my cobra. It looks like some sort of a vent tube with a red o-ring do I...
  8. H

    Rubber Gimbal seal - behind gimbal bearing

    I need help identifying the rubber gimbal seal that sits behind the gimbal bearing on a 1989 OMC it appears to have a metal spring in the seal, i guess to keep it tight on the drive shaft. I need took out my gimbal bearing but have no idea how to take out that seal and before I do, i need to...
  9. H

    COBRA vs. KING COBRA - whats the difference?

    I need to know how to differenciate between a COBRA and a KING COBRA outdrive. SEI offers a conversion kit to replace the OMC Cobra outdrive with their Alpha 1 kit. According to SEI their kit will only work with the COBRA and not the KING COBRA. how can i tel what i have? what is the...
  10. H

    OMC DRIVE OFF - Visible problems - with pics - take a look and HELP

    Hi all, So i finally pulled my 1989 OMC Cobra outdrive which is mated to a 5.7L Chevy 350. My original problem started with not being able to shift into reverse. disconnected the lower shift cable at the top and tried to switch by hand to eliminate some of my suspicions. Shifted fine into...
  11. H

    OMC Cobra - U-Joints - which Part # ???

    I'm pretty sure i need to take my drive off to fix my reverse shifting problem. Since the drive will be off i would like to replace the gimbal bearing and u-joints as well along with the bellows and seals. Cant find anywhere the right part # I need for the u-joints. Can anyone help...
  12. H

    replace or not to replace? (gimbal bearing / u-joints)

    Im pretty sure i have a bead GImbal bearing and possibly u-joints. I have a 1989 OMC Cobra. Outdrive rebuilt end of last season. When idling in neutral, i feel vibrations, thumping and squeaking churning noises. The noises get louder when i turn the wheel to the right and left. At higher...
  13. H

    OMC COBRA Shift problem

    I have a 1989 OMC Cobra 350. Last year the lower unit was rebuilt. Yesterday I was out on the water and experienced shift problems. The Throttle control seems to be working a lot harder. More strength needed to move it into gear then usual. Then the reverse stopped working. I could pull...
  14. H

    Hydraulic fluid - steering and trim

    I want to top off my hydraulic fluid reservoirs. I dont know what kind of fluid is currently in there. My question is if i can just add marine hydraulic fluid or should i drain and refil? Can i mix new with whats already in there?
  15. H

    Oxidized hull (red)- repainting - what paint?

    I have a 7 inch red stripe just below the rub rail that gets oxidezed from year to year. I compound and clean every year only for it to last through half the season. I've decided to repaint. What paint should i use? I've read that some guys on here use a Polyeurothene car finish paint, that...
  16. H

    Gel Coat - sanding and polishing - need expert advice

    So I'm in the middle of resealing my boat bottom with Interlux InterProtect barrier coat before i paint it with bottom paint for the season. I had the boat soda blasted and now i am sanding the bottom to prepare it for paint. I noticed that when I'm sanding the gel coat gets it's original...
  17. H

    blocking the boat - safe trailer removal

    I have a 23' cuddy cuddy boat. I had the bottom soda blasted and now need to seal and repaint the bottom. I would rather not do this on the trailer but instead block the boat which woulod allow me easier access. First i planned to block the boat using cinder blocks. Then someone told me that...
  18. H

    Water absorbtion

    How can i drain the water out of the foam? is this even possible? I know there is water in the foam because i can see it through a small hole through the floor. I can probably fit a small gauge hose through it and try to suck it out. But my guess is that its not going to be able to take...
  19. H

    Bottom paint removal - pros and cons

    Hi there, I have a 1989 Donzi Ragazza 23. It has a few old coats of black bottom paint that i want to remove. I want to use the Aqua Strip paint removal formula. I'vre ready good reviews about it and it is natural. What are the Pros and COns of me doing this? should I worry about Gel Coat...
  20. H

    Upgrading to Trim Tabs and new prop. What size?

    Hi all, I have a 1989 Donzi Ragazza 23 cuddy cabin. It has a 350 OMC 5.7 and cobra outdrive. The boat is in really good condition and I have taken real good care of her. I have decided to install trim tabs for next seazon for a better "hole shot" and change the prop size for increased speed...
Top