Engine toast....did I do it?

[temperedtim]

So I recently had to remove my engine to replace a busted up flywheel (rust). While it was out I changed the oil, plugs and cleaned her up, its been sitting for 2 years. After putting the engine back in and starting it.....etc, it went belly up. I was revving the engine slowly increasing RPM to see if any noises appeared, nothing to to major, the boat is a hand me down from my father... So anyways it was up around 4000 Rpm and it sounds like a bearing let go. I know that the engine is rated for 4200-4600 WOT...is that the same as a red line on a car and do these mercrusiers (3.0L) have rev limiters? If the engine was old and ready to go I can deal with that but did I do this or would it have happened a week from now if not then? I planned on pulling my younger cousins on tubes and water skis....so the engine was going to be doing some work. Im guessing I was around 4000RPM but I was watching the engine...not the gauges when the noise started. Any idea where to get a decent used 3.0??

P.S. I am 28 years old and have been around engines (car and motorcycle) my hole life....didn't want anyone to think I was some kid out there pinning the throttle just for kicks.

 

[IVAZ]

Re: Engine toast....did I do it?

Were you running it on muffs?
Youre not suppose to rev the engine when its not in a body of water.
You have to rebuild your engine, buy a rebuilt one or search craiglist for a used one.
Sorry to hear about your engine.

 

[insaneasylm]

Re: Engine toast....did I do it?

you said it had been sitting a couple of yrs. So did you crank the oil pump to get some oil on the bearings and walls. Did you rev it straigt up or let it idle a little while. Cuz if you reved if up right away you would have had metal on metal at 4000 rpm and i think that would have spun a bearing for sure.

 

[cooter2506]

Re: Engine toast....did I do it?

Question is was it muffs with water to outdrive, if so was it actually pumping water. My WAG is yes you blew it up by running it at that high of an rpm after sitting for two years and not prelubing anything and running it that high on land. 1500rpms max on land. Not enough cooling water at rpms higher than that on muffs IF you had them on. But check Ebay for a used 3.0 or check Rapidomarine for a rebuilt one They have a great reputation

 

[FreeBeeTony]

Re: Engine toast....did I do it?

and........it's not a good idea to rev an engine that high not under a load.

 

[HT32BSX115]

Re: Engine toast....did I do it?

Re: Engine toast....did I do it?

reving any to near redline RPM unloaded....

Uh, yeah.... IMHO.... that's a good way to "toast" an engine that's been sitting idle for a long time.........

 

[temperedtim]

Re: Engine toast....did I do it?

Ok. First the engine was running before I took it out... and it was running after I put it back in, it was running for a while before I was revving it so everything should have been as lubricated internally as it could have been. Of course the muffs were on and the temperature was at normal running temp, same with oil pressure.

So if the bearing went that quick it was probably just a matter of time right?

 

[Bondo]

Re: Engine toast....did I do it?

P.S. I am 28 years old and have been around engines (car and motorcycle) my hole life....didn't want anyone to think I was some kid out there pinning the throttle just for kicks.
So if the bearing went that quick it was probably just a matter of time right?

Ayuh,... You shouldn't be allowed anywhere Near a gasoline motor in My honest Opinion....

Nothing indicates that the motor was about to Puke....
You blew it Up,... Plain,+ Simple............

If you weren't "pinning the throttle just for kicks",..?? What the 'ell Were you doing,..??

Redlining a freewheeling motor has No diagnostic values what so Ever......
Other than turning a perfectly good motor into an Anchor....

 

[temperedtim]

Re: Engine toast....did I do it?

**** you Bondo, who the **** died and made you ****nig God. Like your the king of ****ing combustion. You dont know me or what my "experience" is so go **** yourself. Your gonna tell me youve never revved an engine...your a ****ing squid. So take your opinion and shove it up your ***. I was looking for advise not a dickhead talking smack on a keyboard.

 

[IVAZ]

Re: Engine toast....did I do it?

temperedtim,
Bondo gave you his opinion like you wanted. He did not sugar coated for you. If you wanted somebody to be nice to you, you should have called your mommy.

 

[temperedtim]

Re: Engine toast....did I do it?

wow all kinds of tough guys in here, and I thought these forums were for helping not knocking. K got it, thanks for both of your opinions.

 

[IVAZ]

Re: Engine toast....did I do it?

I was out of line. I apologize to you and the forum. You or I should not bash any members. Bond-o is very helpful and not any of the things you mentioned.

 

[bruceb58]

Re: Engine toast....did I do it?

What is the noise like? Is it definitely from the engine or from the sterndrive area. Maybe you got lucky and its just the gimbal bearing.

 

[Maclin]

Re: Engine toast....did I do it?

Did you have the drive back on yet? If so, was it all the way down? If it was not all the way down then the u-joints could have been stressed and broke, maybe that was the noise. But, why are you asking here if you did this to the engine or not? Will it be easier or cheaper to to fix if it was not your fault?

You do not mention anything about the year or model of the engine and drive, but I am guessing that if it was old enough to have a flywheel rusted that badly that it is a points style ignition and you are the only rev limiter.

The fact that the engine had been running for a while before it let go so you think it should have been all lubed by then....the pre-oiling is to protect it on the very first cranking. Bearings get dry and can scuff enough on the very first movement to catch then sooner or later they will fail. Pre-oiling is the best measure to take to prevent damage from the first startup after 2 years of sitting. That rusty flywheel is another indicator to me that the engine was in need of some serious tlc before cranking it up.

For future reference and as mentioned previously, 4,000pm is way too high for a boat engine on land, the cooling water feed from muffs cannot keep up with the demand. That rpm would also quickly drain a tub unless the water hose is on hard the whole time.

 

[Howard Sterndrive]

Re: Engine toast....did I do it?

replace a busted up flywheel (rust).

What was that issue exactly?
it busted up from rust?
25 pounds of solid steel?

 

[cooter2506]

Re: Engine toast....did I do it?

Temp my man take a pill. Bondo is just voicing his opinion and also that of others on here too. Best thing to do is ask what is this noise instead of posting did I do that. Calling Bondo names like that will get you banned or he with all his wisdom will never respond to another one of your posts whether he can help you or not. Just my opinion.