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  1. Scott06

    Is pulling engine mandatory or just convenient or overkill

    Yeah must pull engine .i would not mess around with a broken flange . Just pull the nine and replace it. It isn’t that much work on typical stern drive boat to pull engine as long as you have the lifting device
  2. Scott06

    Quick Listen: What's this engine noise?

    Take of the drive belts and run it
  3. Scott06

    So, my 2025 Bayliner VR5 200 hp 4.5L mercruiser STILL barely pulls me up

    You should try the 15” or 16” prop I ran a 4 blade 16” on my 3.0 powered boat made a big diff in water starts. I also had a hydrofoil that helped until it snapped the cav plate. Your boat is the 200 hp version, my understanding is the ecu is only change for the 250 hp version. Not sure if the...
  4. Scott06

    Mercruiser trim up and trailer up non functional.

    I think the key is determining if you are getting 12 v to the up solenoid when toggling the trim and or trailer button. based on what you outline I would think intermittently you are not getting the 12 v to fire the solenoid. To test you could jumper 12 v directly to the solenoid where 12 v...
  5. Scott06

    In need of an ECU ‘94 Malibu Echelon

    Do you have a broken one ? these guys repair them https://www.boatunlimited.com/marine-ecm-testing-and-repair/ https://ecmrepairusa.com/product-category/marine-repair/mercury-mercruiser/?srsltid=AfmBOopnFbD8p7vbx3VyxBCj_AQuKgRyvpMKNEVAet7IYmCJyBo9okAa...
  6. Scott06

    4.3L Carb Float height

    depends on if you have a spring loaded needle and seat or not https://www.carburetor-parts.com/Float-Circuit-Mercarb-Marine_ep_615.html?srsltid=AfmBOoq82GwpdRCG7KQSPci131B5EG_jUd1WcW2Uh9LY5t8mjW366uDX mikes is a good place for parts and rebuild kits if you need them
  7. Scott06

    Temp gauge reading 210

    did you use a gasket with the rivets in it for the thermostat housing ? This it o create a good ground between housing and block. If the alarm is not sounding you probably are cool enough. Use and IR gun but if you can touch it briefly its not 200f , 180F is about the hottest you can leave your...
  8. Scott06

    engine shutdown

    sounds like the lower shift cable is worn , the shift interrupt should never trigger going into gear , only when coming out. On dry land there is no load on the propeller (vs in the water) so it will nto trip the switch. Take the lower shift cable off the shift plate - you should be ale to...
  9. Scott06

    Fuel question

    EFI is throttle body with flame arrestor off you should see injectors spraying. Yes you can use starter fluid just be carefully looking down there with flame arrestor off and trying to start. I was helping a friend get a older motorcycle running, I was keeping it running by dribbling fuel down...
  10. Scott06

    Fuel question

    Multi port injection - individual injectors for each cylinder. EFI in mercruiser speak is throttle body injection two injectors for entire engine
  11. Scott06

    Changing to HEI ignition on a 1991 mercruiser 5.0

    IF the current ignition is in good shape why are you replacing? Since you say amplifier I assume you have Thunderbolt 4 ? If so you wont gain anything and likely loose reliability with offshore stuff. Only reason to replace wires is if they dont fit new system or you have high ohms and they...
  12. Scott06

    Frustrating Cooling System Issues

    so it is pushing back to the heat exchanger? is so either exhaust outlet is blocked or elbow is rotted through. Elbow is raw water so if in salt should be a wear item. would be leaning towards blocked exhaust outlet as rotted elbow would probably not create back flow of exhaust. if the...
  13. Scott06

    Frustrating Cooling System Issues

    the hose from the heat exchanger to the riser (elbow) should have water in it not exhaust. this is how the spent cooling water goes over board. there should not be any back pressure from exhaust pushing against thre cooling water discharge - is the exhaust flapper blocking exhaust flow down the...
  14. Scott06

    Clever way to dry dock test new bellows for leaks

    Doesnt take any longer for water to come in via u joint bellow than shift bellow. there is a drain hole from bellows thru transom housing into bilge at bottom of bellows. Trick will be that depending on where bellows are leaking steering and or tilt position can influence the leak. as others...
  15. Scott06

    Need help with mercruiser 454 carburetor

    As bondo said if it is a qjet off a 4.3 it would just be a matter of rejetting. if it is a 600 cfm webber or mercarb you will be down on power but may run all right otherwise If you want a bolt on replacement a Edlebrock 1410 shoudl work nice but may be some issues to sort through on manifold...
  16. Scott06

    If Brand New OEM Sealed Gimbal Bearing got wet for 2 days is it toast?

    make sure all the water gets out of the bellows and it dries. normally when i have seen water ruin stuff is if its sits over the winter. I really hate the sealed bearings I just replaced my original greaseable one on my 04 alpha gen 2. chasing a slight vibration not even sure if it was bad...
  17. Scott06

    Shift cable adjustment

    the 14 mm or 9/16" play in cable measures the lower cable for stretch. if too much play you need to replace the cable. This is done my measuring how much it moves by hand. Unless the cable is newer would s this is your issue the slot on the reverse lever is only used if you cannot get into...
  18. Scott06

    Thermostat too dirty

    Great, your parents must be proud. On a cast block what the op shows is totally normal
  19. Scott06

    Shift cable adjustment

    Best video I have seen on it.
  20. Scott06

    Thermostat too dirty

    Typical of any raw water cooling system used in fresh water. Knock off the big stuff and use it.
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