Ran outboard without water

[bcook204]

Hi everyone, I goofed and ran my 1990 150 hp V6 Evinrude without water for about a minute or two. I then hooked up the water muffs and it was still peeing and no alarms went off. The next day after work I ran it with water muffs for about a half an hour with no change, ( still peeing, no alarms, and the temp of water coming out was not hot still cool
Please tell me I lucked out and everything is probably okay. I am new to this and would appreciate anyone's answers.
How can I tell if something went wrong. Thanks

 

[racerone]

You now need ti install a waterpump repair kit !!------No point taking a chance here,-----The impeller has been damaged !

 

[F_R]

And likely melted the plastic water pump housing also. You can tell when you get in there.

 

[interalian]

This is what can happen when you run it dry.

 

[sutor623]

This is what can happen when you run it dry.

A picture is worth 1000 words!! Inter, whats the story on this particular waterpump?

 

[interalian]

This pump came out of a '79 140 parts motor I bought and am in process of rebuidling its powerhead to fit to my '82 leg. The motor had a litany of problems stemming mostly from poor maintenance and lack of care. The deflector hoses were blocking water around #1, the thermostat housing was full of crud and the water pump looked like this. Oh, and the prior attempt at repair had the center journal bearing misaligned with the pin, cracking the bearing and pounding the snot out of the crank journal. Look at my "getting ready to work on the 140" post for all the gory details.

 

[sutor623]

This pump came out of a '79 140 parts motor I bought and am in process of rebuidling its powerhead to fit to my '82 leg. The motor had a litany of problems stemming mostly from poor maintenance and lack of care. The deflector hoses were blocking water around #1, the thermostat housing was full of crud and the water pump looked like this. Oh, and the prior attempt at repair had the center journal bearing misaligned with the pin, cracking the bearing and pounding the snot out of the crank journal. Look at my "getting ready to work on the 140" post for all the gory details.

Ouch!! Ok Ill check out your thread.

 

[bcook204]

Is there any way of telling before I go buy a kit. It's still peeing strong and no alarms have sounded. Even after a half an hour of running at idle.I have no problem installin another pump. I thought that's what the alarms are for.
Again I'm new to this and I'm just trying to learn

 

[sutor623]

Well for one thing, you are running the motor on a set of flush muffs. You are sending pressure into the motor to "help" the impeller along. Often times when an impeller goes bad, you won't realize it until you hit higher RPMS when the motor is begging for more cooling power. If you hear the alarm at 5000rpms, there is a good chance that the damage has already been done.

You say you ran the motor for a minute or two out out of the water. The impeller is damaged.

Spend the couple hours learning how to do the impeller yourself, pay the shop $300 to do it, or take it out for a full throttle run and risk a $4-6000 dollar rebuild. The choice is yours..............

 

[fhhuber]

You dodged a major bullet.

Get the motor hot then add the muffs, pumping in cold water with hose pressure would be a good way to crack the block and heads. (you'd know it if you did...)

There is no good reason for your engine to not be trash.

Yes, you probably trashed the water pump and most likely the only reason water went through afterward was the pressure from the hose.

 

[emdsapmgr]

The OMC V4 and V6 impellers are extremely robust. Probably some of the best impellers in the industry. Even though you may still have some pumping action remaining-you have to change it. Why take a chance and run it, then risk potential engine damage and having to get towed back into the dock? It's a small expense that may avoid a larger expense later.

 

[Mrcleaningguys]

Tow bills arent cheap. Tow insurance is though. Invest in it.

 

[Yegboats]

The OMC V4 and V6 impellers are extremely robust. Probably some of the best impellers in the industry. Even though you may still have some pumping action remaining-you have to change it. Why take a chance and run it, then risk potential engine damage and having to get towed back into the dock? It's a small expense that may avoid a larger expense later.

Agreed

 

[bcook204]

Thanks for all input. I just ordered a new water pump kit

 

[Fed]

Let us know the condition of the old impeller (pic?) I bet it will be fine.