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  1. Scott06

    Prop Swap opinions...

    yes the 17" 4 blade will be a good one to try. Might also get some stern lift and lower planning speed. In my experience what you give up in tops speed with a 4 blade is more than worth it for what improvements you get over the rpm range where you use your boat most often. Either way I would...
  2. Scott06

    Lower unit oil leak through weep hole after impeller replacement

    Yes that should not be there onky the seal in the yellow carrier someone must have changed the carrier and not seen this seal below it
  3. Scott06

    A couple more I/O questions...

    yes that is a Mercarb not a TKS. The mercarb is the younger brother of the Rochester 2 jet, Mercruiser started making their own when GM stopped making carbs back in late 80's early 90s. you can tell it from a 2 jet because the mercarb will have one idle mixture adjustment screw vs two on the 2...
  4. Scott06

    Best rust loosening material

    Kroil
  5. Scott06

    Mercruiser 409 engine severe vibration issue

    https://powerboat.world/news/254900/Quicksilver-introduces-409-MPI-Bravo-engine Cant tell if it is a chevy based or not valve covers look different but overall configuration looks SBC based either way the the CPO version is a heck of a lot less than the new ones...
  6. Scott06

    Prop change on my bowrider

    I wouldnt touch the edge - what you describe is typical Would expect that to drop your wot rpm a tad
  7. Scott06

    Lower unit oil leak through weep hole after impeller replacement

    Would guess its either the seal below the water pump or the driveshaft seal in upper based on leaking down the shaft below the splines. Although not sure how it would end up inside the pump unless it was the yellow carrier seal. really need to pressure test. Can do the whole drive together, can...
  8. Scott06

    2 stroke longevity?

    No pretty simple and easy to work on. I wouldnt worry too much if you have one that was taken decent care of
  9. Scott06

    Volvo Penta SX-M Mysterious Rattle. Not U-Joints. Not Gimbal.

    Only thing I can think is gimbal bearing is not fully seated or the new drive has a bad bearing in it
  10. Scott06

    Alignment adjustment, witness marks

    I’m pretty it’s It’s inverse it witness marks are heavy on bottom then lower the front …as you’ve seen raising isn’t helping go back to where you started and maybe half a turn lower and then check alignment
  11. Scott06

    Lower unit oil leak through weep hole after impeller replacement

    what did the driveshaft seal under the water pump look like? the seal carrier (yellow plastic) can deform especially if they run hot or was run dry. Given the age might be worth pressure testing while you have it apart
  12. Scott06

    2 stroke longevity?

    As others have stated depends on how they are maintained. We have a2004 sea doo GTI rfi le , bought it with 100 or so hours and have had it 14 years and up around 300 now. I won’t say it runs perfectly but it has been easy on the wallet if you can turn some wrenches. parts are fairly cheap as...
  13. Scott06

    Prop change on my bowrider

    yes when the Outboards get bigger the hub diameter is the same as stern drive props- you just need to make sure it fits an alpha one. look on ebay for enertia or revolution 4 props they fit both outboards and stern drives. When I got my new to me boat in 2016 I spent 2-3 years trialing props...
  14. Scott06

    Starting boat after 4 years - pre start steps

    Did you inspect the bellows and keep and eye on the carb bowl as holleys when they sit tend to leak from bowl gasket - or did you rebuild the carb ?
  15. Scott06

    Prop change on my bowrider

    The spitfire doesnt have much bite in my experience. I get the same WOT rpm with a 23" spitfire as I do a 21" revolution 4. there is that much slip with the spitfire.
  16. Scott06

    Prop change on my bowrider

    As others have mentioned is the tach accurate? Are you able to hit the rev limiter which should kick in around 5050-5100 rpm. If you cant hit the limiter I would verify the tach is correct before changing props. I like 4 blades as for how I use my boat it is more suited. But of course this...
  17. Scott06

    Milky oil from oil cooler failure

    As mentioned just keep changing oil and filter get cheapest oil and you don't have to completely fill the oil pan just run it for a bit when it milks up keep changing it. When it gets clear or almost clear then get the engine under load to cook off any moisture
  18. Scott06

    Rear main seal 5.7

    GM supplied the base engine to Mercruiser (tinned longblock), so the rear main seal is not made by mercruiser its made by GM (or for GM by a parts supplier). Felpro is generally considered high quality stuff. Most likely it go buggered going around the engine stand. When you get the engine back...
  19. Scott06

    Swap mercruiser 5.0 for a 5.7

    yes zero issue keep the gen 2 drive and transom housing 5.7 should drop in
  20. Scott06

    Oil Pressure Sender failure modes?

    Well yes and no... I think the factory OP switch is tripped at 4 or 7 psi .... so at lower rpms yes it may save an engine but higher rpms ... if it was low level and you had 15 psi at 3k rpm not sure it would help We a grew up with older hardware that had no trim gauge, dog clutch drives...
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