200/225

[Jim_Pat]

I looked today at an OMC dealer and tried to see the differance between a 1989/90 200 hp and a 225 hp and we could not find any parts differance. Pistons, carb, jet & heads all showed the same part numbers for both engines.

Can anyone tell me what gets changed to go from a 200hp to a 225hp on a factory stock motor? (besides decals)

[stratos976]

I was just getting ready to ask this question myself.. I did a search on here and read that the carb bore size is the same on the 88-92 20" loopers... What would I have to do to my stock '91 GT200 to make it a 225?

[bigbore]

xp n gt 200 has same carbs,mid bore,reg.200 had small bore:cool:

[Action Dave]

Yeah if you have a 200gt/xp model, it's already a 225hp.

[Forkin' Crazy]

Just looked at the parts book. A regular 200 vs 225 is the carbs.

[imq707s]

Yeah if you have a 200gt/xp model, it's already a 225hp.

So my 1989 GT-200 Looper is actually 225hp? Is that right?

[Action Dave]

So my 1989 GT-200 Looper is actually 225hp? Is that right?

I'm pretty sure that all the GT/XP models came with the mid bore carbs and throttle bodies. Thats the only difference between the 200 and 225.