Cape Horn Owners Beware - Pensacola Fishing Forum

Go Back   Pensacola Fishing Forum > Boating Topics > Boat Repair - Questions,Answers and Suggestions

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 03-16-2012, 09:13 AM   #1
Senior Member
Grouper
 
Join Date: Mar 2011
Posts: 618
Default Cape Horn Owners Beware

If you own a Cape Horn with the white plastic fuel tank under the console, take heed.
We had one with a Yamaha F115 come in this week that was running badly. Upon checking it, found severe crankcase blowby and the front of the engine was oily where oil was blowing out the front of the breather. Called my Yamaha rep and the first question was, is it a Cape Horn and does it have the white plastic fuel tank? I actually had to go out and check the color of the tank. He said that I would find #3 cylinder with predetionation damage. Low and behold, I later found out he was correct. He said that Yamaha use to warranty this until they figured out what was causing it.

What is happening is, the white tank is not UV resistant and the sun hitting the tank degrades the fuel quickly and being the F115 doesn't have a knock sensor, the degraded fuel caused predetionation and ruins the engine. The rep said that they tell owners with this tank to add octane boosters to the fuel and keep the tank covered where the sun cannot hit it.
Even old mechanics can learn something new.
__________________
NelsonMarineService.com
Located on the Sunny Beaches of Panama City Beach
TheCaptKen is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-16-2012, 10:10 AM   #2
Senior Member
Blue Marlin
 
Join Date: Oct 2007
Location: Pensacola, Fl.
Posts: 4,371
Default

That's pretty interesting. I knew that the octane could degrade in a few months.
X-Shark is offline   Reply With Quote Quick reply to this message
Old 03-16-2012, 08:28 PM   #3
Gene
Ruby Red Lip
 
Join Date: Feb 2011
Location: Navarre
Posts: 87
Default Your post scares the begeeez out of me....

Sir,
I have a 04 17 ft Cape Horn with a 04 Yamaha 115. I just took my boat out for the first time since probably October, though I start it religiously every 2 weeks or less over that time, and after about an hour, doing about 1700 rpms (slow) I heard a high pitched whistle that sounded like high pressure being released. It wasn't loud. It lasted about 10 seconds then again for about 5 seconds a few minutes later going about the same speed. Didn't do it again for the 2 more hours I ran it. Towards the end of my cruise I heard a lite ticking, more like a knocking, but subtle. Almost like the sound a loose chain would make 9its hard to explain. It came and went. And, when I parked it at my friends dock for a few hours I noticed some smoke coming out of the exhaust port. BUT, there was fog out so it may have been condensation from the fog and hot exhaust. But I noticed it when I was trimming the motor up leaving just the lower unit in the water. But after a while I went out and drove it to the ramp a mile or two away and ran it hard. Through this all the motor ran fine. From when I put it in until I trailered it. I have had the boat for a year and a half, motor is an 04 with just shy of 200 hours, and since I have owned it I have always used ethanol free gas and yamalube stabilizer and Yamaha Ring Free Plus. No problems with it whatsoever since I have owned it. So, I do have the white (not really white per se because I can see the fuel through the haze of the tank). How can I determine if what you noted may be what is going on with mine. And I'm not sure how the UV rays can get to the tank when it is enclosed inside the console. I went to a reputable dealer and certified Yamaha dealer and talked to a certified yamaha mechanic. After telling him everything I just told you, he said, not to worry about a little smoke and that if the noise is subtle they may not be able to replicate it there (hence take the boat on a run with 2 mechanics $$$ to to try to hear it). He said, if its running strong and peeing he wouldn't worry about it too much. He thinks it fine. Your thoughts? And does anything I mentioned her seem like a precurser to total engine failure? And the head area under the cowling is very clean. Thanks for your time!!

Gene
MyTimeToPlay! is offline   Reply With Quote Quick reply to this message
Old 03-16-2012, 09:02 PM   #4
Senior Member
Grouper
 
Join Date: Mar 2011
Posts: 618
Default

What the Rep is saying is the white tank is allowing UV in the tank and speeding up the breaking down of the fuel. The octane level is critical. But by adding say a canvas cover over the opening, it will reduce this proplem. I finished breaking the engine down today and it amazed me on how accurate the tech was. We've all been taught that the new fuels start breaking down as soon as you pump it in your tank and 30 days it should be replaced.
__________________
NelsonMarineService.com
Located on the Sunny Beaches of Panama City Beach
TheCaptKen is offline   Reply With Quote Quick reply to this message
Old 03-16-2012, 10:41 PM   #5
Gene
Ruby Red Lip
 
Join Date: Feb 2011
Location: Navarre
Posts: 87
Default

Sir, I am no way a professional mechanic our anything of the sort. But what you are saying about the tank doesn't make sense to what I see on my boat or know of UV. My tank is completely enclose in the center console. There is one air vent next to it in the side of the console. And from what I know about UV there needs to be direct (or some indirect)contact with the UV (sun) rays for there to be any UV effects. Like if you are in your house UV from the sun isn't an issue. And when I am not using my boat it stays covered. Please educate me since obviously I missing something. You are a professional on boats..... Any advice or direction you can give me with the discription of the sounds I am hearing from my motor would be very much appreciated!! Thank you!

Gene
MyTimeToPlay! is offline   Reply With Quote Quick reply to this message
Old 03-17-2012, 10:21 AM   #6
Senior Member
Blue Marlin
 
Join Date: Oct 2007
Location: Pensacola, Fl.
Posts: 4,371
Default

Gene...Sounds as through YOU have nothing to worry about. Your boat is covered.

It is the consoles that are open in the back and allow the sun to hit the tank...Yours does not.

Quote:
My tank is completely enclose in the center console. when I am not using my boat it stays covered.
X-Shark is offline   Reply With Quote Quick reply to this message
Old 03-18-2012, 03:07 PM   #7
Gene
Ruby Red Lip
 
Join Date: Feb 2011
Location: Navarre
Posts: 87
Default

Thank you Shark? Any input on my small issue with my motor? Is it possible that it could be just somehting temporary due to not running the engine under load since October or so? Like I said in my post above, I did run the motor religously at least every 2 weeks. Started it yesterday and it sounded fine! Thanks again!

Gene
MyTimeToPlay! is offline   Reply With Quote Quick reply to this message
Old 03-18-2012, 07:04 PM   #8
Senior Member
Grouper
 
Join Date: Mar 2011
Posts: 618
Default

What the whine might be is the drive shaft bushing being dry. There is a bushing just above the waterpump that needs to be greased once a year. That F115 needs the lower gearhousing dropped once a year and serviced which includes greasing the bushing and seal areas.
__________________
NelsonMarineService.com
Located on the Sunny Beaches of Panama City Beach
TheCaptKen is offline   Reply With Quote Quick reply to this message
Old 03-19-2012, 08:21 AM   #9
Gene
Ruby Red Lip
 
Join Date: Feb 2011
Location: Navarre
Posts: 87
Default

Captain, I believe that is what the Yamaha mechanic I talked to last week said it might be. Does that require removing the head unit to get to it? Any clue how much it might cost me to get that taken care of? Thanks again!

Gene
MyTimeToPlay! is offline   Reply With Quote Quick reply to this message
Old 03-19-2012, 08:44 PM   #10
Senior Member
Grouper
 
Join Date: Mar 2011
Posts: 618
Default

Only requires dropping the lower gearhousing
__________________
NelsonMarineService.com
Located on the Sunny Beaches of Panama City Beach
TheCaptKen is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pensacola Fishing Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




All times are GMT -4. The time now is 07:43 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 RC 2