ts 900 l need help

[onlydoo]

I need to know what the max rpm is and the top speed stock is what the revlimiter is set at and after 3/4 trottle theres no more power is it because the prop is'nt got enough pitch on the trailing edge to push more water thru and all ready running on the revlimiter. i adjusted the carb jetting for low,mid, and high speed and jetting is real good for plug color at all speeds any ideas maybe a different multy pitch prop and what angles it come stock with a stainless 12/23 pitchand what top end speed would i expect it doesnt have a tach on it either so not sure what its running at thanks.

[Bryan Glynn]

Max RPM should be around 6700, and the top speed was around 55. The rev limiter is set around 7000.

What prop do you have on it, and what mods?

[onlydoo]

no mods and the prop is stainless 12/23 [img]graemlins/spit.gif[/img]

[Bryan Glynn]

Is that the stock prop? If not - has it ever turned top RPMs with that prop on it?

[onlydoo]

yes its the stock prop and i dont know if it turns them rpms it dont have a tach .thanks read the whole first post

[Bryan Glynn]

Yeah, I read it

Until you get a tach, you can't know exactly what's going on. If you are getting top RPMs early, I would suspect pump damage. If you're not getting top RPMs, I would suspect a carb issue.

[onlydoo]

the carbs seem fine i did plug check at all speeds and plugs check good what would cause lack of power after 3/4 trottle theres just nothing from 3/4 on to full thanks

[Bryan Glynn]

They could be out of sync, the throttle plates could be sticking/out of spec, they could be partially clogged, the throttle cable coul dbe out of adjustment, the choke plates could be out of adjustment...

[onlydoo]

the carbs are all in sync i used a 3 carb mercury vacumm adjuster to set the carbs first before i adjusted the carbs and the chokes are all working fine and all the way open any other ideas.Thanks got to go to work now but will check here tomorro [img]graemlins/crying.gif[/img]

[Bryan Glynn]

You really need to get a tach on there to see exactly what's going on - until you can see what ranges we're talking about, I can't guess - it could be timing not advancing, carburation, pump, etc...

[titanic]

Take a half hour to pull head and look at piston tops. The sharks will run and run with fried pistons but a loss or thrust and top end will be there. Did you put the gaskets on under the flame arrestor plate after scoping carb. Did you use new ones. I think I paid 35 cents apiece from Arctic Cat for mine, so it is not worth being tight about.

[onlydoo]

Hi the compressions fine and i put all new gaskets on when i went thru the carbs.It tops out at 53 miles an hour but theres just nothing after 3/4 trottle i do need a tach i thought there should be more pull after 3/4 thrttle thats why i was wondering if changing props with different pitch would give added throttle and top end speed and witch prop would you suggest and leading and trailing angles thanks

[Bryan Glynn]

What compression readings did you get?

[onlydoo]

115psi on a warm engine all the way across

[Bryan Glynn]

Although that is a little low, if they are even I'd chaulk it up to an inaccurate gauge and not worry about it.