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See post #9 I wonder if the difference is just the jets. That would be a very cheap option. Likely $30.

Ebay and clean it up

When it won't start try the half choke setting. That is enough to pull gas from the carb bowl.

Try swapping the spark plug. You need to get used to starting the outboard at home in a barrel or trashcan water for a few days. Learn when to choke and not to. That's key with these. Use the choke at the wrong time and it'll flood When on the water I always try starting without the choke...

Great. Looking at the specs listed in the for sale ads. Both the 2.5 & 3.5 have the same displacement. I'd bet same cam as well. That said if you ever got to the point where you wanted to upgrade id swap carbs and that may just be all. That 2.5 is a detuned 3.5

What is the year of this 2.5 merc? I'd like to look it up. Just to have an idea of what outboard we are speaking of.

Hey don't mind me. I am just trying to motivate you and let you know you can do anything you put your mind to. Literally... Seem that diy has become thing of the past. These days everyone directs a person to someone who can make the repair vs empowering. You may not feel the desire to take...

Well there's not much talent or experience needed to take these apart. Just a manual/ or parts diagram and keep track of parts. Lol It's just that easy. It was my first time lol and it's been 7yrs. Motor still runs like butter.

These little mercs are a breeze to work on. Very simple motors. I got my 4hp not running, then used a ball hone to deglaze the cylinder. Installed new piston rings, Chris Carlson Reed valves- behind the carb and a 5hp carb. Runs like butter. Easy job. All you need is the will and a socket set.

What years? I have a 98 4hp merc and often wonder the same. Sent from my LG-LS993 using Tapatalk

Even the ring lands look clean. Sent from my LG-LS993 using Tapatalk

Figured id show a better pic of the piston since I've decided to take the motor apart for the winter to replace the piston rings and reed valves. This is after a can of the seafoam deepcreep. Sent from my LG-LS993 using Tapatalk

Man that's awesome!Great job! Sent from my LG-LS993 using Tapatalk

I'd imagine you'll need some long float pods to keep the back end up. Totally following this thread. Check out the guys@ screem and fly forum. I bet this would be somewhat right up Their alley. Sent from my LG-LS993 using Tapatalk

Yep seen that one and figured it was a ripoff. Sent from my LG-LS993 using Tapatalk

Cliffshighperformance.com or quadrajetparts.com are great sources for the bits and other tools. Sent from my LGLS991 using Tapatalk

Welcome! Nice tin! Sent from my LGLS991 using Tapatalk

No issues here. Though i remember the iboats site did a system update a while back. Hmmm... Sent from my LGLS991 using Tapatalk

Right on! Those darn purest always sticking their nose in someone else's tins lol! Sent from my LGLS991 using Tapatalk

1959 Smith Craft that is a work in progress. Sent from my LGLS991 using Tapatalk