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2009 Yamaha F150TXR

Old 06-05-2019, 05:30 AM
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Question 2009 Yamaha F150TXR

I have a 2009 Yamaha F150TXR that has been running near perfectly for almost 10 years. A few months ago, I had a small problem starting the engine. When turning the ignition from run to start, I would only get a clicking sound. I had to turn from run to start several times before the engine would turn over. It would always eventually start so I’ve been living with the problem for several weeks. Yesterday I took the cowling off to have a closer look at the starter. I made sure the pinion was not getting stuck. This had been lubricated previously. Everything looked fine, however, it still took more than 10 attempts to start the engine. I figured I may as well go ahead and look into buying a new starter. HOWEVER, on my last attempt when the engine started, I noticed water spraying out of the top. A closer look uncovered a small hole (2mm) near the thermostat. See attached photos. It looks like corrosion from the inside of the engine block has produced the hole. My guess is that this appears to be a very expensive repair. Does anyone have similar experience? Similar type of corrosion holes? Is there a reasonable repair for this type of problem?

NB - I cannot seem to attached photos - not allowed for some reason.
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Old 06-05-2019, 06:06 AM
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Wow, thanks for your quick response Fwpratt. Interesting reading.
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Old 06-05-2019, 06:42 AM
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Check ground wire on engine for starting issue. Remove it, check for corrosion, hit it with some sand paper.

Check the anode on top of the engine block, which is located above the tstat housing. I am willing to bed it is gone.
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Old 06-09-2019, 06:09 AM
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Your were right Fish’nFool, the anode at the top near the thermostat was severely corroded. I suspect the three main anodes are also due for replacement.
Also, I disassembled the starter and gave it a good cleaning and then replaced it. It seems to be working fine now.
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Old 06-10-2019, 06:42 PM
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So there are just 3 anodes on the F150 block? Two between the plugs and one below the thermostat.
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Old 06-10-2019, 07:19 PM
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Originally Posted by forgot View Post
So there are just 3 anodes on the F150 block? Two between the plugs and one below the thermostat.
no. Please read my post above.
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Old 06-11-2019, 05:12 PM
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Red or Blue ?
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Old 06-11-2019, 07:52 PM
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Anode is 11, bolt to get to it is #10.
Originally Posted by forgot View Post

Red or Blue ?
Neither one. Its the shiny bolt directly to the left of the blue circle next to the molded boss in the block. #10 is the bolt and #11 is the anode in diagram below
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Last edited by ddogopti; 06-11-2019 at 07:58 PM.
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Old 06-12-2019, 03:11 PM
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Thanks. Found them. Fresh water after 450 hrs. of use.

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Old 06-12-2019, 11:36 PM
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Wow, they look good - virtually no corrosion. Mine had nearly disappeared (saltwater).
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Old 06-12-2019, 11:41 PM
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I managed to order JB Weld online here in Norway. Couldn't find it in any nearby shops. Hope to start work on the corrosion area today. Here's hoping JB Weld will do the job. I would be happy to post photos but I am still not able until I reach 10 posts:-(
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Old 06-13-2019, 06:26 AM
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Yeah, just received JB Weld in the mail!
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Old 06-13-2019, 06:34 AM
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Regarding repair of the corrosion hole, I plan to wire-brush a 4 sq inch area of the painted surface around the hole. Next I will roughen the surface with sandpaper before cleaning with acetone. Then I will apply a good thick layer of JB Weld. In addition, I was wondering if it is a good idea to prepare the crater on the inside (in the channel near the thermostat) and apply JB Weld there also? Can JB Weld at some point loosen inside the channel, drop into the channel and perhaps jam the thermostat?
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Old 06-13-2019, 06:46 AM
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BTW, I bought the small sink anode (part 11 in ddogopti´s drawing) at a local dealer here in Norway. I calculated the unit price to 1884 $/lb. At least it is a lot cheaper than gold.
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Old 07-18-2019, 12:56 PM
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Originally Posted by Noroddveien View Post
Your were right Fish’nFool, the anode at the top near the thermostat was severely corroded. I suspect the three main anodes are also due for replacement.
Also, I disassembled the starter and gave it a good cleaning and then replaced it. It seems to be working fine now.
News update.
I prematurely assumed the starter problem had been solved.
Unfortunately, it was only temporary. After additional testing etc, I concluded it had to be the starter/solenoid assembly.
Fortunately, I have been visiting family in California where I ordered a new starter/solenoid on Amazon.
I just got back and installed the new assembly. Eureka! The new starter/solenoid works perfectly. Also, I saved several hundred dollars buying it in the US compared to Norway.
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