Mercury 115 vs Mercury 125 Differences

[Mygreenihc]

From what I understand from a very small amount of information, the 2 stroke 4 cylinder Mercury 115 of the late 90's is identical to the Mercury 125 of the same era with exception to carb differences. I have no idea as to the answer to this question, but I do have a 4 cylinder late 90's 115 and I would love to gain a little more power from this engine if it is a simple bolt on part or adjustments. Does anyone know what the differences are with these two engines and can the 115 be modified to get the addition 10 horsepower?

According to Mercury specs, in 1997, both engines weigh in at 348 pounds, so the weight is identical.

Thanks,
Brad

 

[sourbsted]

Re: Mercury 115 vs Mercury 125 Differences

If you can get your hands onto a mercury owner manual you may find out the differances. I know they do 9.9-15hp manuals..
Cheers

 

[Faztbullet]

Re: Mercury 115 vs Mercury 125 Differences

All you need is the carbs!!!

 

[sourbsted]

Re: Mercury 115 vs Mercury 125 Differences

All you need is the carbs!!!

What don't you know Fazbullet!

 

[Mygreenihc]

Re: Mercury 115 vs Mercury 125 Differences

All you need is the carbs!!!

Would the entire carb assembly need to be upgraded from a 125 or is it something that can be modified when I rebuild my existing carbs?

Thanks for the replies,
Brad

 

[CharlieB]

Re: Mercury 115 vs Mercury 125 Differences

The 125 carbs flow more CFM, you can't do that with a rebuild kit.

Look up the part #''s and prices at

The #1 web site for genuine Mercury Mercruiser engines, parts and propellers

Even used, a complete set of 4 from a boat salvage yard, you may find it best to just forget it.

But another 10 HP would make a nice improvement.

 

[Faztbullet]

Re: Mercury 115 vs Mercury 125 Differences

Here ya go if your serious...
Carburetor Carb Set Assy 824894A 6 for 1994 MERCURY125 Inline 4 Outboard Motor | eBay

 

[frankenmerc]

Re: Mercury 115 vs Mercury 125 Differences

ouch!!!!!That's the price you pay play though .LOL.
Good people to deal with though, I purchased a new trim unit from them at half price around $400 I think it was and other stuff,I had better luck calling and speaking with them on the phone.

 

[frantically relaxing]

Re: Mercury 115 vs Mercury 125 Differences

word of advice if anyone buys those (or any other used 2-stroke carbs)-

Change out those fuel lines. It may save yourself 2 or 3 carb removals to clean the crap out of the jets and orifices...