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May-11-2008, 03:26 PM
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#1 (permalink)
| | GPS Challenged
Name: Alan Vessel: 2520 Parker SL 250 Yammie Location: Eastern San Diego County Job:Trying not to have one..... | Yamaha F250 overheat while engine flush?
Hey any of you with the larger 4 stroke Yammies...
The last couple of times I have hooked up the "earmuffs" to the lower unit to flush the engine its almost like there's an airlock of some sort, and after a while I get the overheat alarm.
I have started the flow at full high (tied directly into my irrigation lines-- excellent pressure), I've tried real low to start then bumped it. Both time when I give it full pressure it does pee, and it it doesn't feel hot.
The water coming out the exhaust feels kinda sorta hot, not real hot.
The muffs are the kind with flow from both sides...
Can you hook up the flush hose after unscrewing the hose fitting on the upper unit near the pee hole and also be able to run the engine that way?
I have flushed doing that without the engine running.
Have any of you had a similar problem?
Thanks in advance.
Never had an overheat at any time on the water.... | 
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May-11-2008, 03:32 PM
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#2 (permalink)
| | Captain
Name: Sal Age: 38 Vessel: Wellcraft 232 coastal Location: OB - Where the debris meets the sea and the vagrants roam free. A great place to be! Job:Got boat? Bio: I have every sympathy with the American who was so horrified by what he read of the effects of drinking that he gave up reading. | I have a yamaha 4stroke 225. Boat is in the water but i always use the hose fitting and do not run the motor. This i think has been covered in some other yamaha threads. I asked the mechanic and he said it is recommended not to run the motor and flush with the hose connector. That is what the manual said too. A good question for yamaha if you have concerns. Good luck.
__________________
My enemies I can deal with, but my friends, my god-damn friends are the ones that are going to kill me.
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May-11-2008, 03:36 PM
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#3 (permalink)
| | Fish Killer
Name: Jim Age: 41 Vessel: 2820 Parker-WIDELOAD Location: SD Job:lite bulb repairman | dont i said dont turn the key and sell the fucking ear muffs
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Big Jim
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May-11-2008, 03:57 PM
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#4 (permalink)
| | GPS Challenged
Name: Alan Vessel: 2520 Parker SL 250 Yammie Location: Eastern San Diego County Job:Trying not to have one..... | Smack me over the head.... of course its right in the god damned operations manual! | |
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May-11-2008, 04:02 PM
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#5 (permalink)
| | Registered User
Name: scott romanovich Vessel: 39.5 Location: newjersey Job:plumber | always use the ear muffs to feed water to the cooling system if you dont you can over heat your motor and ruin your head as you know the water pump is located in the lower unit by feeding water to the lower unit you dont have to worry about starving your cooling system rock on . | |
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May-11-2008, 08:47 PM
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#6 (permalink)
| | Registered User
Name: tod Vessel: 171 mako triumph 210 Location: huntington beach Job:zzzzzz | 04 yamaha 150 always flushed engine off.I was told do not run motor when flushing!!!!
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May-11-2008, 08:57 PM
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#7 (permalink)
| | ME MONGO
Name: Jim Age: 42 Vessel: 23' hydra-sport cc TUNA MAGNET Location: El cajon,ca Job:const, truck driver Bio: Love fishing and hunting with dad | I have the Yamaha F250 2007. I was told by Johnson Marine NEVER NEVER run that motor with ear muffs. They pretty much know there shit.
__________________ MONGO ONLY PAWN IN GAME OF LIFE  | |
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May-11-2008, 10:35 PM
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#8 (permalink)
| | No fish in O'side
Name: Joe Vessel: 26', Striper, Wage Burner Location: Vista Job:Software | I see you already read the manual, but I have the F250 and was told NEVER NEVER run the motor to flush just use the hose fitting with the motor off.
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May-11-2008, 11:53 PM
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#9 (permalink)
| | Taming the west
Name: Mingo Vessel: Seaswirl Striper Location: Carlsbad Job:Tamer of the West | Yami 200 4 stroke here...I have never used muffs on my Yami (however I have used and abused a muff on my boat). Again per dealer do not use muffs, instead use the hose fitting and no need to run motor...Shrimpo must have one of the older models or maybe some other make!!!!...Are we beating a Dead Horse yet? | |
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May-12-2008, 06:38 AM
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#10 (permalink)
| | Registered User
Name: Anthony Age: 52 Vessel: 25' Parker, twin 225's Location: Pahrump, NV. Job:Roofer Bio: fishing, boating, camping, music group (drummer) | I own 2 Yami 225's and one sounds off the buzzer when I flush with the engines on, and yes you can use the hose flush (engine off) but for some reason it does not flush the lower unit very well (salt crusts from the intake), so I choose to use a Y and run water to both at the same time,(muffs, & flusher hose) It works great! | |
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May-13-2008, 10:14 PM
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#11 (permalink)
| | BORN TO FISH NOT CATCH
Name: RICHIE F Age: 31 Vessel: 22' GRADY WHITE JUST-IN-TIME Location: CENTRAL COAST, CALI Job:CERTIFIED MARINE TECHNICIAN Bio: I LOVE TO FISH AND WORK ON BOATS!! SEE U GUYS ON THE WATER | these motors like to be flushed using the flusher hose, no muffs
i have seen a lot that hate the muffs
run the big bucket sequence
__________________  HUMAN BUILT = HUMAN FIXED | 
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May-14-2008, 12:19 PM
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#12 (permalink)
| | Registered User
Name: Dan Bonfield Age: 60 Vessel: blackman 29-comanche Location: escondido Job:business manager | I had the same problem with an older Yamaha 150. I knowledgeable Yamaha mechanic told me it was a characteristic problem with Yamahas. He said if you run it in a barrel it will work better. I was selling the boat, so I just put it in the water and made sure it was ok in the water.
Dan Bonfield | |
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Jun-24-2008, 01:30 PM
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#13 (permalink)
| | Registered User
Name: Dave Age: 54 Vessel: Parker 2320 "Nostrovia!" (to you're health!"), 12' Livingston cat, 11' yak Location: N. Tustin CA Job:I'm your brother from a different muther. Bio: Balding with a long mullet. | Quote:
Originally Posted by shrimpo  always use the ear muffs to feed water to the cooling system if you dont you can over heat your motor and ruin your head as you know the water pump is located in the lower unit by feeding water to the lower unit you dont have to worry about starving your cooling system rock on . | Scott,
Bad advice right there.
Yamaha specs and mechanics say flush the engine with the provided (built-in) hose connector.
It would be a shame to ruin such an awesome engine.
I run the water for 15 minutes on our F250 with the engine off.
I don't mean to be a know-it-all but I read our manual at least twice, and asked my mechanic.
Dave
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Jun-24-2008, 03:00 PM
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#14 (permalink)
| | Registered User
Name: Deno Age: 37 Vessel: La Ultimita (The last one) 252 Wellcraft Coastal, 18 CC Klamath Location: San Diego Job:Zoo keeper Bio: TAMING ANIMALS ONE DAY AT A TIME. |
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Jun-27-2008, 01:56 AM
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#15 (permalink)
| | Registered User
Name: Ian Vessel: 6.6m trailcraft centra cab Location: Perth Job:film | Ear muffs that are worn out or have losted the tension can create that drama with any engines .
__________________
Ian Hollow
Fishing is not a matter of life and death.
It's much more serious than that.
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