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  1. L

    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    I've been making a few modifications to my portable engine crane so I'll be able to use it (it'll have enough lifting height and stability) to lift the engine from the boat... Increased the height of the mast using some 70mm x 6mm angle that I welded together to form a box section (found out...
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    Overheating at idle, cool as a cucumber at speed

    I forget what make/model the little 2 stroke my dad had but it's just a little 1 or 2 cylinder engine around 5hp, it's still at the back of the garage, I might dig it out to use as an emergency/pusher engine on my boat. I have since (still around 10 years ago) rebuilt an early 1980's Mercury...
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    Overheating at idle, cool as a cucumber at speed

    My dad owned a small 2 stroke outboard he used on a tender, he told me "If you ever use that engine be aware it overheats after a few minutes, I've changed the impellor but it still overheats and I don't know what's wrong with it". Shortly after his death I took that engine and an inflatable to...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    I measured the length of shift cable protruding from the rear of the pivot mating flange, measured the distance from drive leg internal shift arm to drive leg mating flange to the pivot, the two lengths are equal.. so it seems I haven't damaged the shift cable by pulling on it. Had an idea...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Thanks Lou. Do you think I'll have damaged the shift cable? I don't know how far it's supposed to stick out at the back, or if the cable seems stretched? Is there an adjuster at the controls? The universal joints and splines seem in great condition. It's oil inside the driveshaft bellow...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    I haven't had much to report until today, spent some time researching my options. I narrowly missed out on buying the 351 (mentioned in posts above) that was removed from a pickup, it was sold while I was still researching potential compatibility issues. Went to view a 302 that was rebuilt 5...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    OK The new manifold arrived today, supplied with gaskets. I expect the other side manifold (the other side doesn't seem to be getting water in engine cylinders) also won't have any gaskets fitted so today I ordered the same gasket set that was supplied with the new manifold so I can fit...
  8. L

    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Also - should I have seen any flappers so far? I haven't seen any.
  9. L

    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    I tend to agree, wouldn't expect the RTV to stand up to exhaust gas flow even if the exhaust is water cooled. But I can't be sure that the manifold or riser isn't cracked, I haven't seen a crack but that's hardly a thorough test. Been wondering if I could do a more thorough test by filling...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Today I removed the suspect exhaust manifold and riser, removed the rocker cover, removed the rockers and pushrods for number 2 cylinder to inspect. There's no obvious crack between the exhaust and water jacket as far as I can see. There was no gasket between the riser and the manifold or...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Thanks, will do. It might not be tomorrow but that's the next thing I'll do. I once helicoiled a pulled rocker arm stud on a 2.5 VM diesel engine. Strange engine, straight 4 but with 4 separate heads.
  12. L

    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    It'd make for better peace of mind to replace all marine manifold parts but it's also a lot more expensive than just changing the part I'm pretty sure is broken. Judging by the compression readings a valve can't be stuck far open and it does run on all 8 cylinders so there must be some valve...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    I had to finish looking at the boat soon after my last post, been out with extended family for a meal. But I did complete the compression test... Still not sure if Volvo / OMC use the same cylinder numbering system as Ford but until I know different I'm calling cylinders 1>4 starboard front to...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Today I took the road cover back off the boat with intention of doing a compression test, I'd already removed the plugs and had also removed the air filter flame arrestor (just for a better view of the rear of the transom and components mounted on it). We had a rain storm the other day and it...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Thankyou very much @Lou C , @kenny nunez and @Scott Danforth , very much appreciated info! I still have concerns about the height for lifting the engine, I understand I could remove the trailer wheels but that would only give me a extra few inches, I don't know if that would be enough. I'll...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Thanks @Scott Danforth , our last posts crossed. This would be the first time I've removed a drive and I didn't know there were flappers! I could probably muddle through but I'd rather admit I don't know what I'm doing and ask for advice / links on major work like that. I can strip and rebuild...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Thanks, makes sense. If I only swap from the 5.0 to a 5.8 could I keep the same lower and just fit a bigger pitch prop? I'm thinking Lou said the drive can take big block power torque so it should be able to handle a 5.8.. Just hypothetical for now, I'll see what's wrong with this engine...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    That's more good news regards the drive @Lou C , thanks again. I did think it possible to be able to fix a valve train related problem with the engine still in the boat, have to remove the engine to fix a bottom end problem. I don't have a stethoscope but I'm often listening around engines...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    @Lou C , Thanks, that's reassuring and seems good news. It probably also explains why prop vendors are telling me props for the SX drive are compatible. So does my drive have the cone clutch or dog clutch? My dad bought a Winner Viscount (cuddy boat made in Wales) in the 80's, it had a 3L...
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    1996 Four Winns Sundowner with 5.0 Cobra engine and drive

    Just to clarify - which Volvo drive? Will all parts be the same? I'll be getting a new prop. I'll check for a PAS leak but the level in the pump hasn't gone down and there's no mess in the bilge. I have noticed there seems to be some play on the steering wheel, if I turn the wheel one way...
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