Recent content by nodima

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    Troubleshooting Merc 225 EFI bogging/fuel issues

    Motor is a 1999 Mercury EFI 225 on a 1990 Mako 230. Symptoms WOT only at 48-4900 RPM Idles at 1200 out of gear, ~800 in gear Chugs and bogs at RPM up to 2000 Takes 3 or 4 times then will jump from 2000 to 4000 RPM This spring, I replaced the fuel tank, along with the fill and vent lines...
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    High Fuel Pressure - 225 EFI

    Been experiencing horrible fuel economy with my 1999 Mercury 225 EFI on my Mako 23 cuddy cabin. The boat had been around 1.7 MPG which is bad enough, but recently it has dropped down to more like 1.1 mpg. Boat was new to me last summer, so I don't have a lot of history with it. Additionally...
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    Surging 225EFI, where to look first?

    Boat is a 1990 Mako 23 Cuddy, motor is a 1999 Mercury EFI 225 Symptoms: Ran out this morning and when throttled up to ~3K, motor surged and raced to 4k+. Figured it to be a spun hub, so went over to a sandbar, set anchor, hopped out and swapped prob with a spare. Problem continued, motor...
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    1999 Mercury 225 EFI questions

    I bought a 1990 Mako with the Mercury engine on it and am in the process of documenting the wiring etc., and installing a new GPS Fishfinder combo which will mean redoing the helm. At this point, all of the gauges are out of the boat, one of the issues identified is the tach only going to 4800...
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    Bigfoot 25 starting issues - fuel related

    Hi, I have a 2005 Bigfoot 25 which is giving me fits, and i want to double check that I'm not overlooking something simple in diagnosing the issue. Prior to last August, this motor had been super dependable, starting almost immediately upon cranking. Last August, I had been running the boat...
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    Motor Choice query

    Looking to repower my 2004 Lund Alaskan 1600 Tiller. Currently have a 25 Bigfoot on it, and want to move up to a 50, which is the hulls max rating for a tiller. One of my options is Yamaha, and a local Yamaha dealer is pushing the T50, rather than the F50, as he feels the ability to push a...
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    Fuel Pump Choice Help

    The fuel pump on my outboard needs to be replaced/rebuilt. The motor is a 2005 Mercury Bigfoot 25, serial number 1B1 84873. I've looked all over, and it appears that Mercury does not stock a diaphram kit any longer, but will sell a pump assembly for ~$90 or an entire fuel pump for ~$140...
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    Lower unit swap

    I have a 2005 bigfoot 25, and found a 2004 50HP short shaft for sale. I'd like the larger motor, and wonder if the lower units are interchangeable on these by chance. Any ideas? I know the bigfoot uses a larger lower unit. Otherwise how easy is it to buy a lower unit alone for a 50? and how...
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    Prop Testing on an Underpowered boat

    There have been several threads around unpowered Quabbin boats, so I thought getting another data point out there might help someone. Today, I had a chance to test two props on my Lund. Background: the boat is a 2004 16' Alaskan tiller, with a 25 Merc bigfoot. It was loaded with me (185 lbs), a...
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    Prop selection query

    I am looking to change props on my Boat, and am looking for some advice. The boat is a 2004 16' Lund Alaskan Tiller Rated for up to a 50hp motor Motor is a Mercury 25 Bigfoot 4stroke 2005 Gear ratio is 2.42; according to the motor it should max at 5750RPM Current prop is a 11.25x10 3 blade...
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    Prop / WOT question

    I have a 25 HP 2 stroke on a 16.5 foot aluminum sea nymph. With just me in the boat I can get ~24.8 mph via my GPS, but the throttle is only at about the halfway mark. Further advancement of the throttle does not result in additional speed or a change in the motors pitch. The same thing happens...
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    Yamaha 25 Gear linkage issue?

    My 1993 Yamaha 25hp 2 stroke displayed some strange behavior this past weekend. After idling through a shallow weedy bay, it would not come up to speed. The engine sounded like it was revving up, but the power seemingly was not getting to the prop. I checked the prop and lower unit for weeds...
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    Trolling motor questions (bow Mount)

    I am strongly considering upgrading from a transom mount to a bow mount trolling motor. The boat is a 16.5 foot aluminum V hull. Currently it has a 55lb thrust Minn Kota Endura, which provides plenty of power. Is there a real world difference in pushing vs pulling via an electric? Do I need...
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    Spring capacities

    I need to replace the leaf springs on my trailer. The existing springs are 3 leaf, and have a capacity of 1000lbs each. The boat is a 1993 Sea Nymph backtroller, 16.5' long. My guess is that it is ~1100lbs loaded. <br /><br />I ordered springs this week, but they sent 5-leaf springs rather...
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    Yamaha 25 Overheating/outboard 101

    I have a 1993 Yamaha 25hp 2 stroke engine that has an overheating problem. Upon taking the engine out of winter storage the tell tale was not flowing. The water pump was replaced. We took the boat out to a local lake, after a short period of time, the engine lost power. At first it seemed...
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