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  1. Oshawapilot

    Belt length for 470 Alternator conversion

    Hey all - the engine in question chewed up the existing belt (I think it had been too loose and also perhaps the wrong size) so we can't read the lettering on the belt any more to get a correct length replacement. Engine has the overhead style conversion, same as this pic: Can anyone advise...
  2. Oshawapilot

    Mercruiser 470, hero to zero. Timing chain jumped?

    Timing advance is definitely on the radar - will be checking it when we do the ignition work.
  3. Oshawapilot

    Mercruiser 470, hero to zero. Timing chain jumped?

    Probably. There is an engine mount on the front on the 470 but it curves around the harmonic balancer and such, so it should be fairly straightforward. And on this boat in particular the stbd engine is the easier / more spacious one to work on, so that's workable. Just not sure if there's...
  4. Oshawapilot

    Mercruiser 470, hero to zero. Timing chain jumped?

    Starboard engine in a 30' express cruiser twin. This engine has run like a champ for years. Currently shows 145 to 155 PSI across all 4 cylinders. Lots of oil pressure, runs in a comfortable temp range and not really abused. From one day to the next last fall this engine went from running...
  5. Oshawapilot

    Mercruiser 470 end of life. Need advice.

    Thanks. Just confirming, as being a twin just swapping out just one engine for something that was a different HP or whatever would be, of course, potentially somewhat problematic. It'll probably get freshened up anyways beforehand so swapping over intake and exhaust, no biggie, but if...
  6. Oshawapilot

    Mercruiser 470 end of life. Need advice.

    So....not a drop in for a 470 then I'm gathering. Still wondering if anyone can confirm parts interchange however...IE, is the block and head basically a 470 but the carb/intake/exhaust is different? Because if the 488 I'm eyeballing is otherwise a low hour creampuff, swapping the intake...
  7. Oshawapilot

    Mercruiser 470 end of life. Need advice.

    Never overheated, very careful there. Boat spends 95% of it's time puttering along not even on plane. And yes I realize the low(ish) compression isn't a timing issue, but I doubt the compression thing is new, the refusing to make any power thing is new. Re the 488, is it a drop in...
  8. Oshawapilot

    Mercruiser 470 end of life. Need advice.

    Hey all. So, about 6 years ago here I came seeking advice on a 30' twin cruiser my sister and BIL were looking to buy. Twin Mercruiser 470's. Received the expected "run away!" messages, but they bought it anyways as it was all healthy and passed all tests at the time with flying colours...
  9. Oshawapilot

    Winterized...found 1 sterndrive full of water, instead of oil.

    Helped my BIL winterize their 35' cruiser today, twin 470's. When draining the starboard sterndrive (Alpha 1's) I found it about 90% full of water instead of oil. Ugh. No signs of metal in the oil that did come out. Now, this drive DID have a noise for a good part of this season - a...
  10. Oshawapilot

    Is winterizing the 470 REALLY that easy?

    The marina my sister and BIL have paying a ton to winterize their 35' (twin 470) cruiser since they've owned it - the marina service people have been charging them the same as a freshwater engine for their winterizing - something like $150 per engine. Needless to say that's a whole lot of money...
  11. Oshawapilot

    Better understanding the Mercruiser 470 starter setup

    With the ignition system issues on the problem child engine finally (hopefully) coming to a close (see my other threads), I'm starting to turn my eye towards the start system. The engine has always been a bit slow while cranking...and while looking at the slave start solenoid yesterday I...
  12. Oshawapilot

    Mercruiser 470 intermittent no spark condition - Lots of diagnosis in thread!

    Ok, 30' aft cabin cruiser with 2 Mercruiser 470's. Both engines run great and strong...but the port engine is suffering from intermittent no spark issues. In the last 12 months it's received a new distributor cap, rotor, points, condenser, coil, plugs, and wires. Both carbs rebuilt from the...
  13. Oshawapilot

    Mercruiser 470 ignition issues

    Greets everyone. Helped my sister and BIL put their big cruiser back in the water yesterday. Starboard engine was a no-fire unfortunately...plenty of fuel, thought I may have flooded it actually, but thinking it was the long winter sitting perhaps I gave it a quick shot of ether...and still...
  14. Oshawapilot

    Can't subscribe to a specific forum

    Thought I'd subscribe to the trailers forum today as I'm a knowledgeable (20+ year) commercial driver and I'm always interested in helping out with trailering issues and questions..but I hit the subscribe button and got an error message saying I wasn't authorized. Feature, permissions error...
  15. Oshawapilot

    1989 31' twin inline 4 prop suggestion

    Hey everyone - I'm helping out a relative who owns a 1989 Sunrunner 302. The boat is equipped with the twin in line four cylinder MerCruiser 470's and Mercruiser outdrives. Yes, there was plenty of discussion and thought about these engines before purchase based on their checkered history...
  16. Oshawapilot

    Isolating stator/alternator on 470

    Working on my brother in laws boat, installed a new set of batteries for them last weekend and had intended to isolate the new house batteries (2x6v golf cart) from the main single 12v engine start battery. Unfortunately I ran into some confusion with isolating the charge circuit from the...
  17. Oshawapilot

    Identifying toilet to source rebuild parts.

    Greets all. Helping my sister and brother in law out with their new boat purchase, 1989 31' cruiser. Amazing condition. The previous owner was pretty upfront at the time of purchase that the toilet was problematic. Having done some digging now, I don't think that he used it much (if at all)...
  18. Oshawapilot

    3.7 with a knock - Questions!

    Greets all. I'm helping my sister and brother in law sound out a variety of boats with the intention of buying a cuddy/cabin cruiser in the 27-30 foot range for travel on the Trent Severn waterway system. We looked at a 30 foot cruiser today, 1989. Quite impressive condition for the year...
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