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  1. #1
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    300 hpdi Problem

    Motor is shooting water and gas out of something from behind the vapor cannister and will not stay running and when you can get it to idle long enough to get in gear it either goes dead or will not plane off. I figure it is some kind of gasket on te intake. It has to be a gasket between the water jacket ?????????????? What do ya'll think?

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  3. AB
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    #2

    Re: 300 hpdi Problem (MIKEinGA)

    I haven't messed with enough of the HPDI's to be real familiar with them yet....Can you post a pic of it (or atleast the general area of the failure)? I'd lvoe to see what's going on.




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    #3

    Re: 300 hpdi Problem (MIKEinGA)

    Since it won't stay running I'd say it's fuel. Like the pressure regulator or something or a hose lose or clamp?


    Item # 10 is the pressure regulator....

    Did you look around with a bright flashlight in the area yet?


    Mike


    Hold My Beer And Watch This !

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    #4

    Re: 300 hpdi Problem (Hamfisted)

    Definately Water and gas coming out.

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    #5

    Re: 300 hpdi Problem (MIKEinGA)

    I have been having trouble with the motor when you give it WOT.It wouold lose Rpm from 6100 down to 5400 when you floor it but not all the time.You could ease off the gas slightly an it would pick back up to about 5900.It would also run ok sometime but really seemed to be down on power but still had rpms.Don't know if all this is related but I thought that maybe the wate was also going into the motor on top end causing the rpm drop.???????????????

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    #6

    Re: 300 hpdi Problem (MIKEinGA)

    Are you sure it's not a fuel pump diaphram. It's located close to the canister. If so there shouldn't be any water though. Have you tried pumping the fuel bulb as you looked into the area where the leak is?

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    #7

    Re: 300 hpdi Problem (Bass Junkie)

    At 6100 rpms are you hitting the limiter??? Your tach could be off by 100 and cause this??? Just a thought.

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    #8

    Re: 300 hpdi Problem (nc521vx)

    I'm not positive on the exact RPM but tach shows in the neighborhood of 6100. A 300 Yamaha on a 202 Blazer with a 27T running light is gonna be around 6000 anyway.
    I felt the liquid that was coming out with my fingers and it felt like water.I could also see an oil slick pretty thick around the motor on the water.I could also smell gas but not as strong as it would be if it were pure gas coming out of the fuel system. My partner also told me today the he thought he saw some oily film coming from the exaust water in the lower unit. I dropped the boat off today at the shop so I'll let ya'll know what the verdict is.


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    #9

    Re: 300 hpdi Problem (MIKEinGA)

    A 300 on a 202 should be ALL over the limter with a 27 pitch.

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    #10

    Re: 300 hpdi Problem (MIKEinGA)

    Just a suggestion, but if it's under warranty, maybe take er' back to the dealer...?

    Doug
    10\' Z8 w/225 ProXS

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    #11

    Re: 300 hpdi Problem (MIKEinGA)

    <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MIKEinGA &raquo;</TD></TR><TR><TD CLASS="quote">I'm not positive on the exact RPM but tach shows in the neighborhood of 6100. A 300 Yamaha on a 202 Blazer with a 27T running light is gonna be around 6000 anyway.
    I felt the liquid that was coming out with my fingers and it felt like water.I could also see an oil slick pretty thick around the motor on the water.I could also smell gas but not as strong as it would be if it were pure gas coming out of the fuel system. My partner also told me today the he thought he saw some oily film coming from the exaust water in the lower unit. <U>I dropped the boat off today at the shop so I'll let ya'll know what the verdict is.</U> </TD></TR></TABLE>

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    #12

    Re: 300 hpdi Problem (MIKEinGA)

    Sounds like a gasket failure around the intake water jacket creating a external leak and allowing water into a couple of cylinders , that would give you the light fuel smell and oily discharge along with a loss of power. If that's the case Yamaha will replace the powerhead, don't worry about the warranty, they're really taking great care of any 300 issues.

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    #13

    Re: 300 hpdi Problem (WWON)

    Just talked with my mechanic and it was a gasket on waht he called the intercooler.The water was going into the engine and spraying out under the cowl.He told me that the powerhead was ok and Yamaha was only shipping gaskets to repair.He also said that this may be a problem on the 300 because he could not get the gaskets until the 18th. What do ya'll think?Should they replace the powerhead?Also remember the motor has had a small miss on top for several months.He said that it was probably caused by some of that water.

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    #14

    Re: 300 hpdi Problem (MIKEinGA)

    Well here's an up date on my 300 HPDI.Dealer fixed blown gasket.I called Yamaha in Kennesaw GA wich is their south eastern headquarters to see if they would go ahead and replace the powerhead instead of just fixing the gasket.I talked with some know it all a@s and he said that they would not replace it because the compression test was good.I proceded to ask him if they should inspect the bearings since the water had been going into the motor.He said the mechanic had inspected the engine.I asked if the had torn the block to inspect.He said that a bore scope was sufficent.I strongly disagreed with him but he would not budge.He also told me that if I wanted the motor torn down that I would have to pay for it.I told him that that was ok that I would run the motor like I stole when I got it back to test the repair.The dealer called me today and said they took the boat to the river to test it and blew it up.So now I will get a new powerhead and Yamaha's little know it all said he would call me back on the 20th to see if I'm satisfied with the repair.He WILL get an I TOLD YOU SO!

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    #15

    Re: 300 hpdi Problem (MIKEinGA)

    hate to hear about your troubles. let us know how it comes out .




    BLAZERMAN
    202DC 250HPDI

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    #16

    Re: 300 hpdi Problem (blazerman)

    Mike, I hate that you even have to go through all that. The thing with Warranty's is that a company will fix THEIR problem the easiest and most cost efficient way possible. If there is even a question that a part could have been damaged they should replace that part. Some problems don't start right away. What if Mike's engine ran, but every time he cranked the engine damage got worse and worse, and then a year or so down th road his engine pops?? Imagine if that happened and his warranty had expired. I don't know, These Billion dollar companys forget that without guy's like Mike they would have nothing. I can gaurantee that if that had happened to an employee of Yamaha, the engine would have been replaced and fixed right the 1st time. Anyway, I hope they fix it right for you now!!!

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    #17

    Re: 300 hpdi Problem (MIKEinGA)

    Mike, just shoot me an IM when you get it back. We'll work out the day to meet.

    Noah, did the prop get there today??

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    #18

    Re: 300 hpdi Problem (nsteere)

    This whole episode probably could have ben avoided.I took the boat in two months ago because it had a miss on top end.The dealer looked it over and even said they ran the boat and it did not happen.The funny thing is it happened to me everytime I went out.I just hope they go ahead and put a fully dressed powerhead on just in case the problem was ignition or fuel related.

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    #19

    Re: 300 hpdi Problem (GE Blazer)

    OK Greg

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    #20

    Re: 300 hpdi Problem (MIKEinGA)

    Mike, I have a brand new 300hpdi as well. So far I think it is a great engine. I hope Yamaha does you right though. In my opinion they should have taken the whole thing down to nuts, screws and washers. I would have been a bit if he had said that I would have to pay for the labor to take the engine down. Congrats on keeping your cool.... if you did!!

    Greg, I got it this morning. Thanks, great service!! Hopefully get to take it to the lake in the morning to see what she will do. Like I said if this prop works out, I will want the other one as well, so if they have it ...put my name on it. Thanks again and I will give you a call this week or early next week!!!

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