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  1. K

    Q-jet Power Piston Spring

    long story short I had to rebuild my carb/fuel system. When I opened my carb there was no power piston spring in the carb. I was going to add one back in as I'm have issues with it right now trying to get it to idle nicely #24 in this wiki section...
  2. K

    making/modifing 10" sub boxes (waterproofing) Question

    So I have a question for sub boxes. I scored a good deal on 2x10" sub and 800w amp I want to add to my boat. They did not come with boxes so I need some. I'm looking at split boxes one to go under each helm/console I was looking at getting these sealed 10" boxes from walmart/amazon, problem is...
  3. K

    boat repower question?

    OK So I have a repower question. I have a 18ft 1986 sea swirl spyder sport 178 with a Chevy 350, its a medium V hull, the hour meter was unplugged at 320 hours long before I bought it 2 years ago. when I started it up there was a lot of blow by and it eats oil. ~1qt @ 48 hours, guessing ~2 hrs a...
  4. K

    shifting question for replacement drive

    So I bought a sei lower unit bolted everything together And bolted it to the boat. I did a shifting check. In reverse the prop is locked either way I turn the prop by hand. In forward the drive only locks when I spin it in reverse, but free spins in forward. To me that's sounds like I have...
  5. K

    shift cable adjustment tool/ place for a OMC Cobra (1986) drawing or CAD file?

    i remember seeing a dimensioned drawing of the shift cable tool/ plate that is used for setting the cables for an OMC Cobra (86-93) does anyone have the link to one or picture so i can print one? looks like these Thanks
  6. K

    Refilling an OMC Cobra Sterndrive (1986) question

    So I'm having some confusion on the oil filling instruction. I bought a replacement lower unit and have it bolted up. to fill it I pull the upper vent plug on the lower unit and put a pump on the lower unit drain and pump it till it comes out the lower unit upper vent. I need to refill the...
  7. K

    Problems with Aftermarket Marine (amarine.com)

    Has anyone had problems with Aftermarket Marine (amarine.com)? I called them and talked to Shawn the owner, he was going to sell me a used/rebuilt stern drive for my boat. This call took place 3/20/2015, I had to do some checking on numbers over the weekend to determine if I needed a 21:16 or a...
  8. K

    OMC Cobra to SEI 116 Stern drive (Mercruiser)?

    Has anyone attempted the conversion from OMC to SEI 116 ster drive? I'm having a hard time getting part for my cobra or finding a replacement cobra. I have already wasted a month trying to get part form aftermarket marine, and i'm giving up on them. I can find 4 & 6 cylinder lowers on...
  9. K

    OMC Cobra + GM 5.7L Gear ratio question

    My current stern driver is shot, the oil had tons of metal in it and was almost in a paste form. I found a guy who will sell me a whole rebuild drive(upper & lower) for cheap. cheaper then i can order parts for. he as 2 drives available. 21:16 & 21:17. looking at my drive I don't see it marked...
  10. K

    Refinishing swim platform/transom platfom, stains & Varnish/Urathane/epoxy Questions

    Refinishing swim platform/transom platfom, stains & Varnish/Urathane/epoxy Questions I have a 1986 Sea Swirl Sypder Sport 178. The 2 rear platforms need to be refinished. so after spending tons of time getting out the rusted non stainless hardware, getting it off the boat, etc. I was able to...
  11. K

    New Here.. 1986 Sea Swirl Spyder Sport needs some love.

    Hello all, So I bought a 1986 Sea Swirl Spyder Sport 178. It has a Chevy 5.7L with a OMC stern drive. Not sure if I have a Cobra or a King Cobra. I need to rebuild the stern drive/lower unit. not sure what I OMC drive I have, after 29 years the sticker on the side is gone story goes like this...
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