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Engine Boggs Down (but runs good)

D

dinows

New member
Brought the boat up river this afternoon and the port engine had no power, could not get it above 1800 RPM (350 Mercruiser)got to the dock and put it in netural, all kinds of power with no load. Four barrell opens with loud noise just like it is supposed to, no knocks, clatter, sounds great with no load. Guy at the dock thought water in the gas ? Any ideas ?

Thanks in advance
 



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Re: power problems under load

Re: Lack of power no rpm over 3000rpm

List of possible causes of low WOT

List of possible causes of low WOT (Wide Open Throttle) rpm.

In no particular order

Engine Won't Reach Operating RPM. Check

1. Fuel condition. Type and Octane possibly old fuel
2. Propeller pitch or diameter, damaged blades
3. Restricted fuel pickup tube or anti siphon valve Fuel System Test
4. Crankcase oil volume, high oil level can cause aerated oil and lifter collapse
5. Marine growth on hull and outdrive
6. Wrong gear ratio in outdrive
7. Restricted carburetor air intake (clogged flame arrestor)
8. Restricted exhaust system (broken exhaust shutters/flappers) in engine transom shield or drive
9. Poor cylinder compression Compression Test
10. Carburetor defective, or wrong type.
11. Fuel pump pressure and vacuum
12. Boat overloaded, improperly loaded, or improperly trimmed.
13. Engine Overheating
14. Engine timing and ignition system operation
15. Remote control cables and linkage for proper travel to open throttle plates fully.

Above copied nd pasted from another website Don s is the author.

PS running up the revs in neutral means nothing.​
 
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