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  1. Mechmagcn

    Tohatsu electrical problem

    Hi all! I have a 2019 MFS40 that recently is giving me trouble. It has always performed flawlessly until yesterday. I noticed upon start-up that it didn't beep when I turned the key, but started like it should. A few hours later I went to start and the battery was dead. Boosted it off and all...
  2. Mechmagcn

    '19 115 Merc water in fuel

    Hi all! I work for a small state park. We're trying to upgrade our older pontoon boat and have acquired a 2019 Aloha barge with a 115 Merc. We were told by the previous owner that a mechanic told them it needed a fuel pump to the tune of $2K. We backed it into the water and it fired right up...
  3. Mechmagcn

    MFS25 fuel in oil

    Hi all. It's been awhile since I've been here, these Tohatsu motors are mostly trouble free. With that said, I noticed my 2020 MFS25 smoking blue at startup a few days ago. Figured I should check the oil and maybe change it. When I pulled the dipstick probably a quart of oil came out, needless...
  4. Mechmagcn

    '23 Merc 15hp EFI alarm

    We have a fleet of rentals at the state park where I work, all running 15hp Mercurys. Most are older, but we have 2, 2023 15hp EFI motors. Both of the new motors are having the same trouble. They start great, idle, and run wide open . It's when you throttle down that the alarm comes on and you...
  5. Mechmagcn

    Houseboat steering cable

    Hi all! I've taken on a job to replace the steering cable on an older 40' Stardust Cruiser. I'm sure it hasn't ever been replaced because I'm running across wires that have been zip tied to the cable in inaccessible places. Oh well, I'll figure it out. My problem is this, I've changed several...
  6. Mechmagcn

    2020 25hp Tohatsu dealer says....not!

    Hi folks! I had posted that I thought this motor was running on 2 out of 3 cyls. dealer says it's running on all 3. A little history, a few weeks back I ran out of gas on one tank and switched to the other. After doing so the motor would almost plane the boat and then act like it was starving...
  7. Mechmagcn

    2020 Tohatsu MFS25 running on 2 cyl

    Hi all! This motor is run daily during cooler weather and on rainy days since our home is by boat access only. It's only been used a few times this summer. A few weeks ago I thought I ran out of gas in one tank, so I switched tanks and made it home. Motor was acting like it was starved for...
  8. Mechmagcn

    Antifouling paint on toons in fresh water

    Hi all! My pontoon remains in the water year round, it is used as a daily driver during good weather and a cargo hauler the rest. Of course I have problems with algae growth. I've been considering cleaning the toons well and coating the lower half with antifouling paint. Has anyone here tried...
  9. Mechmagcn

    3.0 engine interchange

    Hi all, been a while. Trying to get back to my project daily driver. When I had it in the water last summer the 3.0 was somewhat noisy, sorta sounded like piston slap. I suspect that the ski boat it came from sunk before I got it, I've found too much that points to being under water. I have...
  10. Mechmagcn

    '17 Merc tiller shift problem

    At the park where I work we have 5 2017 15HP Merc 4stroke outboards. These motors are rentals and only have 20-50 hours on them. The problem we are having is the tiller shift, you turn the throttle one way for forward and the other for reverse, they are getting very hard to put in reverse. All...
  11. Mechmagcn

    Alpha one lower shift cable

    Finally back to my daily commuter project, didn't have much choice, pontoon's in the shop getting a new motor and the lower unit blew on my small cab boat. Not sure how I got the core back in the lower shift cable, but I can barely move it now. Therefore shifting is difficult at best. What's...
  12. Mechmagcn

    '89 Bass Buggy Pontoon repower

    Well... Our old Johnson 60HP has served us well for 6 years. It was a used '89 model when I bought it and had many hours on it. Last year I babied it along, not wanting to idle and cutting out at speed. Weather is finally warm enough to start use the pontoon again, not going to mess with an old...
  13. Mechmagcn

    Bass Buggy HIN

    My state has started a new requirement for registration this year, either a printed pic or pencil rubbing off the HIN. Well, I've let the registration expire and now I can't find the HIN on the boat. Anybody have any idea of where to look? I've looked all over the rear, sides and front of the...
  14. Mechmagcn

    Suntracker Bass Buggy steering cable

    I've got an '89 Bass Buggy that's getting difficult to steer. It has a Morse rotary steering system on it. A buddy gave me a hydraulic steering system for my other project, so that frees up the Morse system from that boat for my pontoon. Tried to replace the system today only to find out...
  15. Mechmagcn

    3.0 engine ID

    When I bought the old ski boat that I'm using the I/O from for my repower, the previous owner told me he had recently replaced the engine with a later model. The boat was an '87 model Avanti, but I finally found the serial tag on the engine. From what I find online the serial 4158791 is from...
  16. Mechmagcn

    35hp vibration

    Hi all! A few weeks ago I installed my spare motor, a '83 35hp Evinrude on my boat. It seems to run well and does a good job pushing this boat, but it has an odd vibration in forward gear only .It is smooth at idle and in reverse. Put it in forward and it rattles the boat at idle and smooths...
  17. Mechmagcn

    Carb identification

    Finally had time to get back on my project. Fired the motor yesterday for the first time in about 5 years, of course the carb needs a little attention. In looking online there could be either a Rochester or Mercarb. Attached is a pic of the carb tag, which do I have? Where is a good source of...
  18. Mechmagcn

    Uh-oh! Motor locked!

    1990 48 Johnson. This has been a very dependable motor for almost 6 years as a daily commuter. Went to leave the dock and it died at idle in reverse. Tried to restart and it was locked. Pulled the boat out of the water and pulled cowling. The motor would turn most of the way and then lock...
  19. Mechmagcn

    Repower, need prop ideas

    I am current working on a new to me daily driver. Boat is an aluminum flatbottom pilothouse jonboat, 18', 54" bottom and 20" sides. I figure it weighs less than 1250lbs. I'm repowering it with a Mercruiser 140hp 3.0 and Alpha One drive. The drive has a Solas 14.3X23 aluminum prop. I'm sure this...
  20. Mechmagcn

    Winter use of Mercruiser

    We live on a river in south AR and use a boat as daily transportation. Currently using a Jon boat with an outboard, but am working on a larger pilothouse boat with a Mercruiser Alpha I and 3.0 liter. This boat uses raw water cooling. My question is this: We occasionally have sub-freezing temps...
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