Search results

  1. Scott06

    1984 120 hp carb issue.

    first one is a guy who rebuilds pontiac tripowers (same rochester 2 bbl design you have) so use your factory float specs second one is from mikes carb parts he has lot of good videos on his channel but this one setting float height is not the best visually.
  2. Scott06

    What's the right boat prop help

    Sounds like it has a high five prop on it Given speed and rpms . Q has you steered correctly 19 or 21” pitch start with a black max or similar to get your bearings then can step up to something better if you like. Really depends on what you want to use the boat for
  3. Scott06

    2008 4.3 ltr mercruiser overheating alarm

    did you replace the temp switch that triggers the alarm? did you check your exhaust manifolds and elbows for clogging? This can restrict water flow mostly in salt or brackish water use
  4. Scott06

    1987 3.0 engine rebuild

    Best way to get more power out of a 3.0 is swap in a 4.3. if you want to use the newer head i think this adapter will make your existing manifold fit the newer head. https://www.michiganmotorz.com/mercruiser-exhaust-manifold-adapter-plate-kit-high-output-3-0l-engine
  5. Scott06

    1984 120 hp carb issue.

    Assuming choke fully open s, Most likely float level or too high fuel pressure both lead to higher bowl fuel level . Id start with float level and drop check or replace needle and seat Plus measure fuel pressure.
  6. Scott06

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    yes I suspect you have some guage accuracy issues around 150 psi is new, unless you had water or gas in the high one I suspect thats an outlier. Typically I think you start getting dead cylinders below 120 psi. The carbon fouled plug is way rich I suspect that may be yoyur issue, although as...
  7. Scott06

    fuel pump frustration

    try googling carter marine fuel pump thats what lead me to summit.... https://www.summitracing.com/parts/crt-p4389 . None of the electric fuel pumps have the overflow tube as they dont have a diagraphm to rupture like a mechanical pump that requires somewhere to fuel safetly go. As nola pointed...
  8. Scott06

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    Agreed none of those compression numbers would make me think the engine needs to come apart.
  9. Scott06

    fuel pump frustration

    https://www.summitracing.com/parts/crt-p4603hd
  10. Scott06

    1992 Mercruiser 4.3 w/ balance shaft and 1 piece rear main seal swap to newer year Vortec.

    Youwill need to buy a new intake manifold for the vortec heads so id upgrade to edlebrock 1409
  11. Scott06

    2013 monterey 204 fsx prop not operating

    Yes most likely prop hub has failed as it is intended to brake when yiu hit something. assume you are back on the trailer take prop off look at the hub there are two styles older rubber pressed in hub, or newer replaceable hard plastic insert. Run tge engine on the muffs and see if prop shaft...
  12. Scott06

    2003 mercruiser 4.3 issues

    take gray wire off tach first if needed This is thunderbolt ignition trouble shooting guide https://www.boote-forum.de/attachment.fphp?attachmentid=114582&d=1231576181
  13. Scott06

    3.0 Mericruser Manifold Help

    Whats the question are you looking for a different manifold that fits your carb ? What carb are u using? Or are you looking for what carb fits this manifold what year or serial number on your 3.0
  14. Scott06

    Trailer Guide Ons DIY?

    I adde some guides to a trailer i using pipe flanges and fittings
  15. Scott06

    Another surge question

    Tie down is not the best but has served me well for the last 6 years that bolt is in the hole to Lock out out braking when reversing take the bolt outand see if the brakes work
  16. Scott06

    Other causes for prop slip?

    No test against a shop tach or timing light with tach feature
  17. Scott06

    3.0, engine oil, breather tube questions

    The 3.0 I had in my old boat had about 800 hrs on it and 145 psi compression and I saw the same amount of blow by and oil as you are seeing. I thought it was an issue but had good compression, wouldnt worry about it.
  18. Scott06

    Carbed Mercruiser 260 5.7L Missing Above 4000 RPMs

    clogged exhaust is possible if an exhust shutter falls down into the wye pipe. They can make their way into the bellows and restrict exhaust. If you had the drive off recently and looked in the exhust bellows and that was clear look into the tops of the wye pipe. I cant recall if you measured...
  19. Scott06

    A little give on the shaft?

    When the prop moves in and out look at the nut I bet the nut and shaft is moving with the prop. Its a common thinking this is an issue, has come up many times on this forum
  20. Scott06

    Prop pitch change

    As mentioned elsewhere you want to prop it to hit in the correct WOT rpm range so more or less for prop testing. The big issue you will have if you dont know it currently is you dont know where to go with your next purchase because you have no baseline. My brother did the same thing because his...
Top