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  1. Mechmagcn

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

    Entire fuel system has been cleaned and flushed by dealer, plus 2 new tanks is what cost me $300. Not sure how debris made it past a 10 micron water separator and the screen on the motor, but that was the dealers excuse. Now he says "he's done all he can do". I'm trying to get stuff together...
  2. Mechmagcn

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

    Oh, by the way, I'm not new to boats or outboards, just the newer 4-strokes and fuel injection. We live on a river in south Arkansas and our boats are daily transportation. I bought this motor hoping to not have to work on it weekly like I was doing the 30y/o Johnson it replaced. My experience...
  3. Mechmagcn

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

    Yes, the motor was delivered with a 10 pitch prop. Until this started it ran right below the max rpms, so it's not overpropped. Induction tach, I've tried three different ones and have yet to find one that will work on this motor.
  4. Mechmagcn

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

    Not sure what difference this would make, but oil level is on the full mark with motor level. Please explain?
  5. Mechmagcn

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

    Pulled the boat back out of the water , checked oil level, right on the full mark with motor level. Pulled the plugs, still white with a slight haze. Decided to put the old ones back in, motor would idle smooth, but when throttled up it would cut out and sometimes backfire. At times it would run...
  6. Mechmagcn

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

    Prop isn't spun, the motor never comes close to max rpms. Before when you got the boat on plane you could trim the motor slightly until it would cavitate and the overspeed alarm would sound. Now you have to trim up till it almost stops pulling before the alarm will sound, that tells me it is...
  7. 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...
  8. Mechmagcn

    2020 Tohatsu MFS25 running on 2 cyl

    All three original plugs were identical in color. Dealer tech says the fuel pressure is 42#. They also said I have a total of 55.3 hours on it. Going out of town for a few days, so won't pick the boat up till next week. I'll be sure to troubleshoot and find the problem before we start using it...
  9. Mechmagcn

    2020 Tohatsu MFS25 running on 2 cyl

    Took it back to the dealer, they say nothing is wrong with the motor. Uhh....it would push the boat 24mph one day and won't push it over 15 now, something is wrong. Sounds like I'm going to have to try to figure it out myself without voiding the warranty.
  10. Mechmagcn

    2020 Tohatsu MFS25 running on 2 cyl

    This is the boat, but before the new Tahotsu.
  11. 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...
  12. Mechmagcn

    fuel mileage

    As others have said, on a pontoon boat you're going to burn a lot of gas above cruising speed. My 18' Bass Buggy with a 40hp Tohatsu 4 stroke sips gas below 4K, but at WOT it burns probably three times as much with very little increase in speed.
  13. Mechmagcn

    Bimini Top Replacement?

    Just bought a replacement fabric for my barge off of eBay, $119. 8'X8' four bow canopy.
  14. Mechmagcn

    40hp vs 50hp looper pistons and rods. Scratching my head!

    I ran into something similar on a '90 model 48 SPL. Mine cracked the crown on a piston and I bought another power head from the same year motor that had a bad crank to get a piston. One had the smaller cutouts and the other had the larger. Had to use both, but noticed no difference in performance.
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...
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