Sounds good, and looks better. I love that hull.

i had the same problems ...
you don't want to put weight in the front of the boat......
she's running rich or just common in omc's ?
mine also preffered to idle at "level"
i never put it all the way down at idle unless i was gonna get readdy to launch it
she'ld clean up and go ....
maybe my jets are off?
i thought merc's might be the same ....
some other guys might clear this up
my evinrude was an '83 150 XP, so i don't know if it's the age...
it could be the nature of the beast , i just learned to deal with it and drove it to compensate
they are big 2 strokes...if you have no oil injection(like i don't) it could be all the above, angle of motor, flooding with oil,exhaust under water ....
sounds like it's ok , lol
your boat looks good

Now she moves, I Figured out the lack of power to plane. Went through the Carb Jets and the previous owner had some really Lean jets in it! There was 34, 47 and 57 jets in. I re-jetted with 35, 66 and 61D's as per a factory stock 93 225 Johnson. And this is the result.....

Tether Kill and PFD were on out there.

VIDEO HERE

I dont have my Chopper and shooter back yet so I was out on that Junk aluminum 23 pitch prop. Needless to say it was blowing out the prop and I couldnt give it WOT. Water was pretty rough on the St Lawrence aswell but I had the gps on the boat. At 3/4 to off and on WOT gps in KMS was at 108 to 114. I'm sure with it not blowing out aswell as on calmer waters and with the Chopper it should move pretty good.




Couple pics from the day :

It may or may ot help you out, But I just posted a grat set of big bore carbs in the parts section. They would fit your motor and may be cheaper than new jets. 912-604-5595 or frederick55@windstream.net

Wow, That intermediate jet was off a ways from stock. Tracking down some stock jets and going from there sounds like a good starting point.

Boat looks killer by the way. Thats a lot a motor for that little Vision. I like it!

Wanted to get out today just to give the boat another run and see if it would respond but I didnt get a chance. Although I did Go through the carbs tonight and I think she's under jetted.

According to OMC a 1993 225 came with :

#35 Idle Air jet
#66 intermediate Jet
#61D High Speed Jet


On my motor I pulled out :

#34 Idle
#47 Intermediate
#57 High


So that would explain why at idle and off load it was responsive but then Mid throttle and High Throttle it wasnt getting up. I guess these Jet numbers Equate to the actual size of the Orifice Jet Hole. Going to try and track down the stock jets aswell as a few sizes bigger Locally. Might not get a set in ontime for the weekend.

Some good info here guys I appreciate all info, sometime when you are trying to figure out some problems other peoples info helps you not to get tunnel vision on one issue so to speak.

Well after talking to a Mercury Tech today he has given me some insight on this exhaust situation. He said to contact Land and Sea to see if they have had any situations like this and also to see it perhaps this exhaust kit was supposed to block the exhaust passage to the prop completely.

Also he had said these Looper motors are extremely hard to tune because of the 3 jets per carb. He brought up an interesting point about when the exhaust is submerged when trimmed down. It is most likely loading up the cylinders and running extremely rich. When i was trimming the motor up to get the exhaust above the waterline and gave it a shot it was responsive and had more power.

I am going to try a little experiment and see if it works because it will tell me right away if this Exhaust is the problem. I am going to make a Square plate out of Aluminum and cut a 2 1/4 inch hole in it and TIG weld a 2 1/4 aluminum round pipe to it. I'll bring the exhaust up above the waterline and go back out and try and plane. If the boat gets up and goes, I'll get a factory OMC mid and call it a day. If not...I have lots of gas cans and and a **** ton of matches!!! lol

I think your onto something. I have a rude 2.6 liter that when trimmed all the way down seems to "flood" a little bit, when I trim up, it "cleans up" some. I always thought it was the float adj.....just too lazy to fix it.LOL.

I am running a 225 looper on a Viking. I ported the exhaust on the lower unit old school style and did not block it off through the prop. It comes on a plane great with no ill effect on hole shot and everything is submerged. Just my opinion, but like Jacklake I think it must be someting else. The motors were designed to have the exhaust submerged. Have you checked the timing on a dyno? I had a similar problem that lead back to the fuel pump. Check the line that gives the air pulse from the block for leaks, and go from there. Also carburetor bowl floats might not be adjusted right, starving it for fuel causing a lean condition, like jacklake was saying. It sounds like it's starving for fuel. What size looper is it?

You mean it won't get on plane at all with the exhaust submerged? If so, I think maybe there is another problem; fuel mixture, fuel delievery, etc. I guess the above water exhaust is really effecting how it runs, it sounds like it's running a bit lean. I would probably just go back to stock exhaust, but I'm sure you can get your set up to work with a little more tweaking. I would shy away from adding weight or drilling any more holes. Good luck and keep us posted! - Chris