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E-10 Bug Update 2...
dauntless-n-miami
#1 Print Post
Posted on 07/21/13 - 9:11 PM
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Finally installed the freshly rebuilt carbs, new fuel pump and all the accompanying hardware that had been removed for the repair.

I discovered early that the Factory Yamaha manual lacks some specific info such as torque spec's for the carburetor and fuel pump 6mm bolts. Did some online research and found some useful values.

I purchased a small 3 gal Moeller portable fuel tank and set it up as a stand alone unit for O/B start-up's when at home and will be using it exclusively with Recreational-90 (Ethanol-Free) fuel. I will still be using E-10 (with additive) for actual boat outings but will alter my routine of refilling the tank once back home. If remaining fuel from outing sits for a spell inactive it will be easier and much less to pump out.

After reassembly was complete I did the "Link & Sync" procedure for the carbs refilled the 2 stroke oil reservoir and connected the 3 gallon portable tank. Primed for fuel I hit the ignition. It took a few turns but she fired right up!!! Choke solenoid kicked in and kept the idle up a bit, once it settled it was a bit low at about 650-700 rpms. I adjusted the idle screw till the tach read 800.

The Yamaha idled beautifully from that point on. It appears to have great throttle response and idles right back down to 800 rpm's after a rev up. I chose to replace the fuel pump assembly just in case the OEM unit had been compromised. At about $41.00 dollars it's good insurance.

This initial start-up was done with Rec-90 fuel and from this point on when at home the O/B will be run on this same type of fuel. I will do this routine in hopes of maintaining or preventing my whaler's primary fuel tank from having to store fuel for long periods that will most likely spoil and re-contaminate the O/B's fuel circuit if used. I will try to keep my primary fuel tank dry and only fill it when prepping for a day of boating or at least with a very minimal quantity of fuel.

I would only use the Rec-90 fuel if I had easy availability to it, as it stands I had to drive 38 miles (round trip) to purchase the 3 gallons at a pump price of $4.20 per gallon (price at the marinas is much higher). I did buy an extra 6 gallons and filled a "Jerry can" as a back up. I did add the traditional Sta-Bil (red liquid) to both supplies for added protection.

The carb re-build was a success and I will be paying closer attention to my filters and condition of my fuels from this point on.

Thanks to all who posted and followed my original thread...

Angel M.


1996 Dauntless 15, Sportsman Pkg. - 2007 Yamaha 90 HP 2-Stroke
 
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