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#11836491 - 09/19/16 05:46 AM Turning Over a Dry Motor
Jigfish Offline
Extreme Angler

Registered: 02/28/03
Posts: 2922
Loc: Tx
I am by no means starting any [censored] here so don't even go there. This all happens at the weigh-in so the boat is out of the water. At a tournament over the weekend the top 5 has to do a boat check. And one of the things is to pull the kill switch and turn over the motor to make sure it doesn't start. My concern is dry starting my motor. Being a Merc, Yamaha or what ever. Is that doing any damage to the motor, I.e. a dry water pump or anything.
_________________________
Thanks,

The weak call it obsession, the strong call it dedication!
Jigfish


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#11836512 - 09/19/16 06:34 AM Re: Turning Over a Dry Motor [Re: Jigfish]
Bobby Milam Offline
TFF Team Angler

Registered: 07/13/14
Posts: 3473
Loc: Arlington
I don't think the slow speed of spinning under a starters power will have any effect. Now if it cranked and was turning at idle speed then I'd be concerned

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#11839646 - 09/20/16 03:11 PM Re: Turning Over a Dry Motor [Re: Jigfish]
forkduc Offline
TFF Guru

Registered: 03/28/07
Posts: 11883
Loc: Plano,Texas
Won't hurt anything as long as it's a quick on and off

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#11840358 - 09/20/16 09:55 PM Re: Turning Over a Dry Motor [Re: Jigfish]
Dubee Online   content
Extreme Angler

Registered: 07/17/11
Posts: 1686
Loc: Godley Tx
I wouldn't do it. Back it in the water to start it.

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#11840524 - 09/21/16 05:50 AM Re: Turning Over a Dry Motor [Re: Jigfish]
Freeman Clark Offline
Extreme Angler

Registered: 03/18/05
Posts: 1375
Loc: Temple, Texas
Boat checks should be done before the start of tournament.Not after the fact.

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#11840714 - 09/21/16 08:38 AM Re: Turning Over a Dry Motor [Re: Jigfish]
shotgunwilly Offline
Pro Angler

Registered: 06/22/08
Posts: 829
If you're pulling the kill switch first then it's not going to hurt because it won't start the motor. Compression checks are done all the time like this.

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#11840790 - 09/21/16 09:19 AM Re: Turning Over a Dry Motor [Re: shotgunwilly]
redchevy Offline
TFF Celebrity

Registered: 01/25/05
Posts: 7081
Loc: texas
Originally Posted By: shotgunwilly
If you're pulling the kill switch first then it's not going to hurt because it won't start the motor. Compression checks are done all the time like this.


x2

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#11843483 - 09/22/16 01:51 PM Re: Turning Over a Dry Motor [Re: redchevy]
rongleaves Offline
Outdoorsman

Registered: 05/17/16
Posts: 151
Loc: Sunnyvale,Tx
Originally Posted By: redchevy
Originally Posted By: shotgunwilly
If you're pulling the kill switch first then it's not going to hurt because it won't start the motor. Compression checks are done all the time like this.


x2



Exactly my thoughts

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#11844117 - 09/22/16 08:08 PM Re: Turning Over a Dry Motor [Re: Jigfish]
lakeman Offline
Extreme Angler

Registered: 07/27/05
Posts: 1887
Loc: cedar creek lake
Are any of you old enough to remember that when most everyone pulled there boat out of the water they would disconnect the gas line and run the motor till it run out of gas ?Have saw it done bunches times,
_________________________
Jerry R.


http://www.jackiekennedyfishingguide.com/


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#11844952 - 09/23/16 10:45 AM Re: Turning Over a Dry Motor [Re: lakeman]
redchevy Offline
TFF Celebrity

Registered: 01/25/05
Posts: 7081
Loc: texas
Originally Posted By: lakeman
Are any of you old enough to remember that when most everyone pulled there boat out of the water they would disconnect the gas line and run the motor till it run out of gas ?Have saw it done bunches times,


Always did on our 1985 evinrude. Dad would run the gas out of it every time we took it out of the water weather it was going back that afternoon or not. Ran that boat from 1985 till 2014 and never once had a fuel issue with it. It had 95 psi compression when we sold it and would still start on the first crank.

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#11844970 - 09/23/16 10:53 AM Re: Turning Over a Dry Motor [Re: Jigfish]
bronco71 Online   content
Extreme Angler

Registered: 02/05/06
Posts: 1459
Loc: Farmers Branch/Sulphur Bluff
My worry would not be the motor......it would be the water pump running dry

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#11845619 - 09/23/16 06:15 PM Re: Turning Over a Dry Motor [Re: bronco71]
rb7764 Online   content
Extreme Angler

Registered: 01/08/04
Posts: 2075
Loc: Frisco, TX, USA
The kill switch grounds out the ignition system. If it is working, the motor will turn over at cranking speed, but not start. This will not damage the impeller. If the switch is not working, get it fixed.

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#11845817 - 09/23/16 09:07 PM Re: Turning Over a Dry Motor [Re: Jigfish]
Team Brown Stripe Offline
Extreme Angler

Registered: 04/25/07
Posts: 2165
Loc: Carrollton, Texas
The way Mercs work running a dry impeller will generate heat and damage the impeller. They fit tightly up against the inside of the housing.

I bought this a year ago and it works great.
http://www.ebay.com/itm/151972537148
It says you can run the motor dry for 15 minutes but I wouldn't run it dry any more than you need too. I had this impeller on my workbench for a couple days before installing it and it kept weeping an oily substance.
_________________________
Youtube video of my tired old fishin motor on the Dyno thumb
https://www.youtube.com/watch?v=RiI-UfMEUw0
www.XtremeMarine.us



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#11845828 - 09/23/16 09:13 PM Re: Turning Over a Dry Motor [Re: Team Brown Stripe]
Chris B Online   content
TFF Celebrity

Registered: 05/02/03
Posts: 8010
Loc: Prosper, TX
Not unless I backed it into the water. I've changed that HPDI impeller enough to know it doesn't take much to lower the water pressure. Most of the time the damage is hardly noticeable. What do you think Yamaha would say if you told them you were cranking it out of the water?
_________________________

I hate photobucket.

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#11845838 - 09/23/16 09:15 PM Re: Turning Over a Dry Motor [Re: Team Brown Stripe]
bronco71 Online   content
Extreme Angler

Registered: 02/05/06
Posts: 1459
Loc: Farmers Branch/Sulphur Bluff
Originally Posted By: Team Brown Stripe
The way Mercs work running a dry impeller will generate heat and damage the impeller. They fit tightly up against the inside of the housing.

I bought this a year ago and it works great.
http://www.ebay.com/itm/151972537148
It says you can run the motor dry for 15 minutes but I wouldn't run it dry any more than you need too. I had this impeller on my workbench for a couple days before installing it and it kept weeping an oily substance.




cool, I've been waiting to see how those work out! I'll probably use one next time I change impellers.

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