3.0 mercruiser NEED HELP

NinoGerber

Recruit
Joined
Feb 12, 2013
Messages
1
Took boat out twice with previous owner before buying and had no problems. After buying boat took it out maybe two times with no problems. Then one day things changed. Running across lake FULL THROTTLE and boat all at once starts loosing power while making a sound like being bogged down and sounded like was coming from exhaust. Then motor makes fast ticking noise. Finally stops after kicked back in neutral. All day at same speed. Next trip started at slower speed, and so on.
 
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fat fanny

Lieutenant Commander
Joined
Feb 9, 2006
Messages
1,935
Re: 3.0 mercruiser NEED HELP

Welcome aboard. Could be loss of compression(I know that sound) check compression on all for cylinders, could be lack of fuel but doubt it, When was the last full tune up? plugs,wires,fluids. You'll need to troubleshoot before spending $ on parts look up in the stickies@ the top of the forum for allot of usefull tips besides the ones listed in this post. good luck!
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,465
Re: 3.0 mercruiser NEED HELP

Took boat out twice with previous owner before buying and had no problems. After buying boat took it out maybe two times with no problems. Then one day things changed. Running across lake FULL THROTTLE and boat all at once starts loosing power while making a sound like being bogged down and sounded like was coming from exhaust. Then motor makes fast ticking noise. Finally stops after kicked back in neutral. All day at same speed. Next trip started at slower speed, and so on.

Ayuh,.... Welcome Aboard,.... Please read the forum rules, at the top of the main iboats forum page...

What have ya done to it since,..??

If ya haven't, do a Compression Test, 'n see what's up...
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
17,620
Re: 3.0 mercruiser NEED HELP

Youtube video would be helpful, if you can, so we can hear the noise and how the engine sounds, etc.

The fast ticking noise could be a valve issue . . . the compression test should give some evidence.
 

spdracr39

Lieutenant Junior Grade
Joined
Aug 30, 2010
Messages
1,238
Re: 3.0 mercruiser NEED HELP

could it be as simple as a water filter ?
 

Rick-101

Seaman Apprentice
Joined
Jan 27, 2012
Messages
48
Re: 3.0 mercruiser NEED HELP

What engine, drive and year...3L's don't have water filters to my knowledge and would not cause a loss in power but an overheat.
Start with the compression test as the others have said, otherwise its like fishing without a hook for the problem. Read the forum rules for posting and the more knowledgeable members will surely be happy to help.
 
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