Question about 2008 Mercury Mariner

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Outboard problem I have a 2008 90hp Mercury 2 stroke outboard on a 17 foot fishing boat at mid to full throttle the boat wants to go to the right

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  • stephen gosser May 11, 2010

    post your problem on this site they are very knowledgeable

    http://forums.iboats.com/

  • yadayada
    yadayada May 11, 2010

    this is a car site, no resources for this type of engine.

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Adjust the bottom Finn under propit has to be perfectly straight when motor is straight it's like a rear end ailinemen for your boat

Posted on Mar 14, 2015

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Adjust the trim by loosening off the 13mm nut holding the anode above the prop, turn it the opposite direction and I reckon your problem may be solved.

Posted on Aug 05, 2012

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Check your prop...probably slightly bent and only is noticeable at higher rpms.

Posted on May 21, 2009

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1 Answer

1995 mercury 150 horse runs great idols great but very slow .when put in reverse quits seems like to slow idol . what screw do i turn for fast idol


Seems like your are describing a outboard motor. If so, the Boat section of Fixya may have more experts that you need. You would want to avoid turning any screws on the carburetor body. The externals on the linkage have some adjustments like throttle stops.

The linkage on boat shift mechanisms are tempermental. They usually combine 2 functions on 1 control lever. They are synchronized that when the transmission shifts from neutral to forward and neutral to reverse the idle speed is low. This keeps the gears from grinding and takes the shock out of the shifting process.

Another thing different than on a car engine is the effect of the propeller on engine rpm. You can change the "in gear"
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This also means you can over-rev the engine by having the wrong prop on the boat. There are engine rpm "stops" for the high end too, but some just rely on using the correct prop. As what you may be experiencing with a "stall" can be brought on by

A word of caution. The inboard/outboard engines can have the same problem as outboard engines. The shift levers are synchronized with a pivot system and adjusting the throttle can interfere with the shifting.

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Are you sure you don't have a 2001 Bayliner Trophy? ;>)

7 gallons, but they come in sizes 17 feet to 31 feet and 125HP to 225HP.

2001 Bayliner Trophy Asking Price: $13,999 OR BEST OFFER Condition: Good. Description Location: Ridgewood, New York Seller's Notes: AWESOME BOAT!! Body Style: Power Boat Length: 21 Hull: FIBERGLASS Class: FISH/SKI BOAT Engine: 2010 Hyundai 150 # Engines: one Fuel Capacity: seven gallons Horsepower: 150 VIN: Request the VIN Seller's Comments Great boat, Lots of storage, 270 hours on motor, Well maintained, Reliable, Great for the lake, Depth/Fish/GPS System, Well equipped, Live well, Pump, Anchor, Seats four, Lots of cabin room, Equipped with toilet.

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Red portable fuel marine tanks hold 6 gallons. The size is marked on it. If you have a fixed tank, they are usually 20 gallons, but to be sure use my method and a fill.

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it looks to be a boat and from the poor quality photo it appears to gave a prop under it
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from the view of the cut down transom it may take an out board as well
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For sure you are putting more hours on your engines than a non- commercial user. Check for fuel filters.

This is the CARS and TRUCKS section of FIXYA. We do have a BOAT problem section which may have more help for you.

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