I have a 1996 - 200 and I got a set of 225 carbs off a 1994. The 225 carbs have 67d main jets. I was told to put 72Ds in them and use the 96 airbox. Any comments on this??? Any recommendations on jet sizes. There seems to be such a wide range of jet sizes used in the 225s - why is this?? I am looking for performance here.
Welcome to the BBC.
I agree, use the 72D's and the 96 air box, after you get this combination on your motor you need to do a Wide Open Throttle shut down,( run the boat at WOT and pull the kill switch) This is Dangerous, if you have never done this before, have your technician do it for you, you then need to read the plugs, this helps you get the mixture correct.
This must be done to insure the fuel/air mixture is correct, if not checked you could cause damage to the motor.
The numerous jet sizes used in the different 200 225 are because of carbs, heads and other things.
One suggestion, make sure you trim your boat all most of the way down so it's plowing in the water while still holding it wot before cutting it off or pulling the rip cord. Some hulls don't take too kindly to having the power chopped while they are aired out and you could find yourself in for one of the wildest rides you've ever taken. As mentioned, this can be dangerous so try a couple of kills at somewhat slower speeds before doing it at wot.
No can do - its an allison. Can I come to a stop gradually and then look at the plugs. I have been checking my plugs as the motor is now and they are a tan color. I am hoping the 225 carbs will stop this coldbloodness that the 200 has in the morning - hard to start. The throttle roller is off the bracket as Rusty suggested last year but still a problem - can you tell me how I could do something with the carb adj screws?? It does run okay once it is warmed up. Will it be better with the 225 carbs??? Can you tell me what combination of idle and mid range jets would be best with the 72D mains??? I REALLY APPRECIATE THE INFO
Gary, if you come off the throttle slowly it will change the plug readings.
On the low speed and intermediate jets, I would leave them as they are and see how she runs.
You should see improvement with the 225 carbs on rpm's and top end speed.
Gary, The hard starting of these motors has been covered here before. Do a
search and I think you may find your answer. Larger carbs don't usually equate
to better low speed performance. Steve
Thanks Steve - I did take the roller off the throttle bracket as recommended and it did help some. What I could use is some advice on best procedure. What I have been doing is - tilt motor all way in; pump up bulb til hard; hold gas peddle down about 1/4; hold choke in while turning switch to start. Now? - what happens is - after turning over quite a bit it starts but dies - I have to keep pumping the choke to keep it going. It will die some more. Unless it is warmed up it will die upon butting it into gear. More cranking and hitting throttle, etc.
Gary, On mine I pulse the primer/choke about 10 or 12 times BEFORE cranking.
I think holding the throttle open might make it worse-more air. Also don't lift
the fast idle lever, that disables the Quik-Start. Steve
I only have a foot throttle so - no fast idle except by my foot or the motor itself does it.
Steve, motor temperature disables quick start, Motor level, Prime bulb till hard, turn key on, hold key in while cranking, once motor starts release key, wait 1/2 second and push key in 3 more times with a 1/2 second pause between pushes.
If your plugs are tan after a regular run and you backed down normally then my guess is you are running lean at WOT. Each cylinder on the loopers should be jetted by it's own color. High speed shutoff is the only way I know to do this. Just keep the Ally flat and you should be OK. Go over on byuboyz and ask the drag racers how they do it. They know a whole lot more than I do.
Rusty
I have some 76D and 78D mains - I would have to order the 72s. Wondering if I could try those - being richer and all - is it going to hurt the motor? Thanx
It shouldn't hurt it but it wont run very well on top end.
Using the 78s - Would I have to run it without the airbox on the carbs - so it got enough air? Not that I'm likely to do that but I assume the theory is - bigger main jet - more air needed??
I would not run it without the air box, you should order the 72D's.
Thanks Rusty - will do - I just bought an airbox off a 1998 225 John. I think the guy said the carbs had 62Ds jus like the 225 carbs I bought. Wondering if I should use the carbs I have as is and the airbox I just bought - OR - am I going to get a lot better performance with the 72Ds in those carbs anyway and should order?? I priced the jets - they ain't cheap.
I would stick with what you already have and add the 72D jets.
I'm convinced - will do - THANKS Rusty. I assume going down in main jet size means a leaner motor and possible trouble? That Bullet you got with the 225 ETec is gonna go - maybe into the 90s.
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