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  1. Scott06

    Mercruiser 305 V-8 Temp issues

    the balls are part of the warm manifold system, allows some cold water to flow to elbows when thermostat is closed (cools exhaust) then should shut when warm water off the thermostat comes up through manifolds. Theoretically cuts down on condensation in cold manifolds by just supplying cold...
  2. Scott06

    Mercruiser 305 V-8 Temp issues

    depends on what thermostat 140 or 160 140 thermostat should be 150 or so My 160 thermostat runs about 165-170 not being under pressure like in a automotive radiator they run cooler temps so it doesnt boil and lessens mineral scale buildup
  3. Scott06

    Mercruiser 305 V-8 Temp issues

    Pressure test the cooling system- block of inlet and outlet hoses with pipe fittings, T in a gauge, rig up a way to inject compressed air. Should hold 15 psi relatively indefinitely. If head gasket is blown would expect to see air coming out a cylinder via sparkplug hole and or into crankcase...
  4. Scott06

    Mercruiser 3.0 LX Mechanical Fuel Pump. I am replacing with a new one is this normal?

    no good and snug with a calibrated elbow....
  5. Scott06

    Mercruiser 3.0 LX Mechanical Fuel Pump. I am replacing with a new one is this normal?

    Clamp it in a vice. It will be stiff but should move. Doesnt need vacuum or pressure but there may be plugs in the inlet and outlet that need to be removed . If it doesn’t move return the pump.
  6. Scott06

    Mercruiser 5.7 with V6-14 TB IV module??

    Attached is a helm wiring digram. It show the purple coming off the key switch thru the kill switch, then daisy chaining through the gauges to supply the alarm and then the purple ignition wire. you are likely losing the 12 v on the purple though the multiple connections. The alarm isnt to put...
  7. Scott06

    Mercruiser 5.7 with V6-14 TB IV module??

    What is the blower alarm? All the kill switch should do is interrupt 12 v ignition circuit from key to engine harness. I’ll see if I can dig up a helm digram
  8. Scott06

    Mercruiser 305 V-8 Temp issues

    If the hose is getting stiff and the elbows and risers are hot then I would think water flow out through the exhaust is impeded and manifolds an risers will help. Did you verify that the ps cooler is not blocked? Some where there is a flow test for alpha one drives. I think like 3 -qts in 15...
  9. Scott06

    Need Air Compressor Help

    This wont be getting full voltage to motor downstream of pressure switch. Plugging it in to multiple outlets wont fix that
  10. Scott06

    Chainsaw cutting lube in a pinch

    Had a vet recommend the same to get heating oil out of dog fur ... worked very well at 11 pm on a sunday night... although he recommended Palmolive. given the amount of time on this thread the OP could have driven to any gas station for motor oil
  11. Scott06

    Closed Cooling System Part # 860234A1

    Why dont you post a pic of the engine and bracket where it is hitting the belt. Wonder if belt is on wrong or if someone added the seawater pump separate. Is the engine an alpha model originally as you list both alpha/bravo above ?
  12. Scott06

    What does this marking mean on this new to me outdrive?

    He is just being a wise azz... Did you ask the guy you bought it from.... Yes most likely customer name so they can put it back on a boat in the spring, which must not have happened... Did it pass a pressure test?
  13. Scott06

    Bought a Used Boat, but what is it?

    What is it - probably a bucket of chit. The more you stir it up the more it will stink. I think by the time you check the stringers, transom, and floors for rot you will wish you left it where it was sitting. As others have eluded it is a really obsolete engine and drive combo. Yes the engine...
  14. Scott06

    Mercruiser 5.7 with V6-14 TB IV module??

    Check the kill / Man overboard switch. ignition gets power off starter when cranking then switches over to purple wire when in run. Can verify by putting key in run, check for 12 v at coil positive terminal
  15. Scott06

    Mercruiser 5.7 with V6-14 TB IV module??

    if it worked before you pulled the dist most likely is it is mis timed. The V6 module will work fine to run And you don’t have to advance it more than your normal 10 degrees initial to get it to start. It will not give as much total advance but you can worry about that later. I tested my engine...
  16. Scott06

    Can't remove 5.7 vertically.

    Nice whats under the hood of the chevy?
  17. Scott06

    Can't remove 5.7 vertically.

    Nice. The only thing I may suggest- something to make sure the chain can't slide off the end if the engine gets hung up on something
  18. Scott06

    Sea Water Pump Cover - Question

    Best to search on this site by serial number but I think 13 is waht u are looking for https://www.marineengine.com/parts/mercruiser-sterndrive-parts/350-mag-ski-gm-350-v8-19911996/0d505450-thru-0k040399/sea-water-pump-assembly
  19. Scott06

    help with engine block swap

    The two piece uses this coupler That bolts to crank hub https://www.michiganmotorz.com/mercruiser-hub-style-coupler-1985-earlier other diffs are the starter bolt pattern. I believe your original engine will use a 14” flywheel with staggered pattern , replacement engine will use the 12 5/8”...
  20. Scott06

    9670 Carb question

    Are you looking to rebuild or replace the carb. If looking to replace vs rebuild i belive an edlebrock 1409 would be a drop in replacement
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