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  1. Scott06

    Manifold and riser/elbow question for V6 Tahoe Q4

    call tahoe boats and ask if you cant take it back to the water. Also may be in the parts manual for the boat. I found on my sea ray it was listed in the part manual that the V6 engines didnt have risers and the V8 engines did, but ...it does specify what height risers. Do you still have the...
  2. Scott06

    Mercruiser 5.0 oil pressure question

    three things will make the alarm buzzer go off engine over temp low oil pressure low drive lube as mentioned verify oil pressure with mechanical gauge could be pressure switch verify engine temp again switch could be bad verify drive lube level you can disconnect these sensors one at a...
  3. Scott06

    1986 Mercruiser 3.0L

    A couple thoughts take,out the primer bulb see if it goes away. test fuel pressure when it dies, verify pumping throttle that fuel shoots out of accelerator pump nozzles verify good hot spark when it dies
  4. Scott06

    Altitude Issues in Lake Tahoe?

    As mentioned you will loose 18% power vs sea level due to 6k ft elevation. Not sure if you are carbed or MPI? Normally for intermittant use merc just reccomends going down in pitch. If carbed and you will keep the boat at that altitude you rejet the carb leaner as well drop pitch to get enough...
  5. Scott06

    2005 regal commodore 2750 stringer/transom material?

    it could be around the drain plug and not have anything to do with rot. On my sea ray the fitting that the plug screws into is only a brass tube 3/4" long held on with three 1" screws. The screws were bent and loose from tightening the plug... it came right out the wood stops above the plug...
  6. Scott06

    5.7 EFI running hotter on starboard exhaust

    its not unusual for one side to be hotter 30-40 deg than the other. I have never checked mine with a IR thermometer but others may know what the range is. I suspect if you can touch it for a second or two your ok.
  7. Scott06

    New engine - No Fire (Volcruiser)

    So putting your spark tester on the wire from coil to distrbutor cap do you get spark off the coil ? If not it is the sensor in distrbutor or ECM. I assume you have the delco est on there but not sure. If you do get spark off the coil but not out of the distributor I would think cap and rotor...
  8. Scott06

    Aluminum risers

    Barr or OEM merc hold up well neither are low price. What ever you go with make sure the surfaces where riser/elbow seal are flat
  9. Scott06

    Repowering 97 crownline. Best options?

    Their silver and gold series partials come with delco est . Not sure what universal wiring harness the gold comes with ? Here is the wiring digram for delco EST with shift intterupt on a electric fuel pump engine. I belive vs the original merc thunderbolt this supplie a momentary 12 v + to...
  10. Scott06

    1992 3.0L I hear air leak in #4 cylinder

    Like rick said if you dont block off the manifold the air in the cooling jacket on the manifold will leak out the riser into the exhuast. if a exhaust valve is open you will get airflow back in the cylinder. either block off the manifold to riser joint or take the manifold out of the test...
  11. Scott06

    5.7 Mercuriser Cracked Block

    What he said. If its running has good compression and oil pressure put it in and run it.if the truck engine is a vortec and the old one is not you will need a new intake… but vortecs are worth 40 hp
  12. Scott06

    1992 3.0L I hear air leak in #4 cylinder

    How was it winterized? Without disassembly it could be head gasket or cracked block. Did you isolate the manifold water jacket for the pressure test? if your sure its leaking into number four pull the head and see if the gasket is roached.
  13. Scott06

    New engine - No Fire (Volcruiser)

    Do you have 12 v to positive side of coil when in run? What ignition system is on it?
  14. Scott06

    Merc. MPI 300 Water Leak-Water Distribution Housing? & Winterization Question

    Thats essentially it although I dont know the size you need. If you have enough room you certainly can put a brass one back in, the expansion plug was suggested for ease of installation as yoyu only need a wrench or socket to tighten the nut and expand it. Either will work fine. For what its...
  15. Scott06

    1997 5.7 LX knock sensor

    Yes the TBV gets a bad wrap due to the cost of the ignition module. When I repowered from a 4.3 to 5.0 i bought 2 used modules on ebay and sold the 4.3 one for like $200 each. I put a search in on the module when they pop up for a decent price I bought a spare
  16. Scott06

    5.7 Mercuriser Cracked Block

    If it were me I would get a new vortec base engine from Michigan Motorz. Thats what I did when I repowered for same reason you are (PO didnt winterize...) Yes it was more money, but I'm now on my 6th summer with absolutley no issues, just beat the snot out of it skiing and wakeboarding...
  17. Scott06

    Mercruiser 3.0 L Prop Question

    Quicksilver/Mercury Black max is a good choice. Yes quicksilver is a good barnd. They are the same as mercury products but it is a separate line so they can be sold outside the mercury dealer network
  18. Scott06

    aq penta volvo 140a

    Yes same as on a car
  19. Scott06

    5.7 EFI running hotter on starboard exhaust

    Always the simple stuff. should be ok now did you replace the thermostat while you were in there ?
  20. Scott06

    2 Black sparkplugs

    Good
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