max driven clutch problems
i have an older maxII that had a jlo 295 2stroke in it i just replaced it with a briggs vanguard 16hp i have the right clutch on the engine but i still have the clutch on the trans that was from the 2 stroke motor when i was driving it today at full throttle i could run faster than the machine went could this be because of the driven clutch spring. The driven clutch seems to open way too fast
l___>
000
what good is it if it dont float
Crackpot Cruiser
it should be the other way around ,top speed is achieved as the drive clutch closes and the secondary opens , are you sure the drive clutch was closeing properly as the rpm increased ??
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i still have the original clutch (and spring) on the T-20's of both machines i've converted to 4 strokes. while i'm sure i'm not getting every last bit of performance out of my driven clutch with the"wrong" spring, it doesn't seem to cause me any noticeable issues either.
is your belt tension set properly? correct width belt? ...
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I am having problems with the bolt that holds the belt pully on the T-20 to my MaxIV coming loose.Originally Posted by Robinhood02
Is there a torque setting or what am I doing wrong. I am new to working on the machine so I have limmited knowledge.
Hammer
Use some thread locker on the bolt this time when you tighten it back up.
clean the threads on the bolt and in the T-20 shaft with some brake clean, and use blue thread lock. you can pick up both at any auto parts store
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.
Is the motor bogging and not able to reach a good RPM? Or is it revving but just not going very quick? Is the Drive clutch closing all the way, bringing the belt to the top of the pulley, and finally, when the motor is off, is the belt sitting at the top of the driven, actually sitting with the top of the belt above the edges of the driven, or is it flush or recessed, because if so it's really worn or too narrow a belt, and that will make you loose "low gear" causing tons of bogging/performance issues. Also check for glazed belt, pitted or worn clutch faces (Not flat from center to outside, use a straight edge, JerseyBigFoot has pics of this in the Gallery.)
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I'm not entirly sure of the specs of the JLO, but in most cases two strokes generaly rev to 5000rpms or more. And inless the vanguard is modified it is limited to 3600rpms. Second, 4 stroke engines develop more low end torque than 2 strokes and the cluthes (both drive and driven) need rpms to engage and hadle the torque. So, different spings and possibly (if they're changeable) weights need to be changed to suit. The stock driven clutch may be waiting for the extra rpms that aren't there and therefore causing the belt to slip. Also, are you sure the engine is tuned properly for the elevation/conditons of the environment because if its not it will make your 16hp feel more like 3hp even though it may seem like its reving (this condition being to lean) and therefore not driving the clutches fast enough to achive full speed. And lastly, possibly the clutches inside the tranny might be slipping and need to be rebuilt.
the trans is fine it worked great with the jlo295 i got about 45-50mph out of it as for the clutches the drive clutch was brand new from comet and it was calibrated for my application the driven clutch operates fine when i have the machine in up on the lift with no resistance the wheels spin like hell but when i put the machine on the ground and try and drive it the transmission clutch (driven) doesnt fully open the belt just stays at the top im going to try a smaller belt tomorrow and see if that helps i dont understand it i had this motor on a gocart and it flew 50+mph on the GPS i know im not going to achieve that kind of speed in the max but i hope to atleast be able to go about 25-30 mph
l___>
000
what good is it if it dont float
There is not enough HP. Check the tune. Spark plugs, carb. jets, spark (magneto ect.), new fuel, and air filter. If its able to spin to full cap. with no resistance than with, the motor just doesn't have enough to get up to speed. One way to check this is to do a full speed run down hill and see if the driven clutch peaks. If so then the motor is under powered whether under sized or untuned.
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