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  1. Scott06

    1970 181 to a 1978 181 different engine harness?

    You can instal the bearing without motor in the boat just can’t align the bearing to the coupler if it isn’t there
  2. Scott06

    Mercruiser 305 V8 running hot at low RPM fine at Speed

    I suspect it has something to do with emissions rating original engine had one of these CARB rating star stickers on it - I want to say the 2 stars. IT was originally a 4.3/190 hp with a Mercarb that had the antitamper cover on idle mix screw. Surely set as lean as possible to pass emissions and...
  3. Scott06

    Mercruiser 305 V8 running hot at low RPM fine at Speed

    My2004 carbed raw water came factory with a 160
  4. Scott06

    Barr manifold carb gaskets.

    I had this same experience on my 3.0 when i rebuilt the carb. Factory had used a two hole gasket with no support from below. My carb kit came with both gaskets so installed the single hole gasket thinking it would be ’more better’… cannot explain why but with the single hole gasket the idle mix...
  5. Scott06

    Alpha One Gen II shift shaft seals

    This is how mine were factory installed and i replaced them in the same manner last year when i did my bellows. Normally i believe the spring goes to the side you want to keep sealed so this is correct also make sure the bushings are replaced
  6. Scott06

    Need help with plugs selection

    Yeah That's a vortec so you will need MR43LTS or equivalent
  7. Scott06

    OK to Delay Recommissioning One Year?

    Don't overthink it. I let my 65 GTO sit for 8 years without running at one point. New Battery spun it to build oil pressure, no issues...
  8. Scott06

    Another Plumbing Question

    If you have hard water there may be sediment on heater as well There is an anode rod usually in the heater wonder if it is getting expended due to water chemistry. Would check that and replace the dielectric coupling
  9. Scott06

    Mercruiser 305 V8 running hot at low RPM fine at Speed

    Not trying to overcomplicate things but If you are running a 140 thermostat and the gauge is accurate there is still something going on here. I run a 160 thermostat and it stays at 170-175. When I used to run a 140 thermo in my old boat was sitting at 155 or so. I think the alarm went off at...
  10. Scott06

    OK to Delay Recommissioning One Year?

    I don't think you will have any issue. My neighbor at the lake is the opposite of me on maintenance- changes his oil every couple years, drops his drive lube if its not milky pumps it back in... he has a 99 bayliner/5.0 2 bbl seems to hold up ok. He doesn't put a ton of hours on it but gets a...
  11. Scott06

    Intake manifold verification

    You have a picture of it on the head ? What’s no good ?
  12. Scott06

    Mercruiser 305 V8 running hot at low RPM fine at Speed

    This thread from 2012 has the flow test numbers in post #4 https://forums.iboats.com/threads/water-flow-volume-test.555080/
  13. Scott06

    Mercruiser 305 V8 running hot at low RPM fine at Speed

    that doesnt look like a lot of water at idle. I'll see if I can find the water flow test from merc manual If balls were loose (try to set NOLA up good here...) they would be passing too much water at idle directly to exhaust then overboard. Thats why the lines off the T are cold - they are...
  14. Scott06

    Mercruiser 305 V8 running hot at low RPM fine at Speed

    If you have the check balls on the thermostat housing they can pass raw water from the impeller right out the exhaust starving the engine. Somewhere in the merc manuals there is a flow test for quantity of water coming up to the thermostat housing. Easy test to do to verify water is getting...
  15. Scott06

    Lost gearage?

    In theory you can do it your self if you have the merc specific tools ($$), a factory manual, and some decent know how. I think usually if you are paying someone to redo it You end up at the $2k SEI aftermarket cost or the new Merc ($3400) cost pretty quick the gear set kit alone is $600...
  16. Scott06

    Damp exhaust manifold

    i think normally best to test the manifold by filling with acetone that will wick into cracks easier. Other than that yes two gaskets would only be used if there was a block off plate in between for closed cooling. Would take all gasket material off and file it flat or use belt sander. If they...
  17. Scott06

    Lost gearage?

    same ratio as you have ... 1.65
  18. Scott06

    Penn Yan Commander 339 (33') with a tunnel hull

    Any boat that this 20 + years old of that vintage can have stringer or transom rot. a good marine surveyor should be able to diagnose these issues and use a moisture meter to tell the condition of the structure. If you are not versed in this I would recommend a survey , could be the best money...
  19. Scott06

    Penn Yan Commander 339 (33') with a tunnel hull

    Have you water tested it yet? My grandfather had a 66 Penn Yan Imperial 19, was a nice fishing boat. At that time they made tunnel hull and I/O versions of the same boats. I do think in shallow water areas the tunnel hull can be more popular or somewhat desired. I suspect the inefficacy is more...
  20. Scott06

    Need help with plugs selection

    It looks like in your other thread you have an 8 bolt intake with 8 vertical intake to head bolts. If that is the case use MR43 LTS. As bondo mentions Vortec is the head type not the block. Given the interchange of parts over the last 68 years on the SBC you can have a lot of mix and match of...
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