I have aquired an OS FS120, but the feeler guages are awol. They are the bent style to fit into the rocker arm area.
I am asking if anyone has a set of these that they are not using, could I make a deal with you?
Thanks everyone.

Dan

[COSMOS]

I have an OS 4-Cycle Gauges & Tools Kit
http://www.greathobbies.com/producti..._id=OS72200060
Price $12.00 including all shipping cost
I have Paypal
Please let me know
Regards
COSMOS

[Guest]

Originally Posted by Scale Freak

I have aquired an OS FS120, but the feeler guages are awol. They are the bent style to fit into the rocker arm area.
I am asking if anyone has a set of these that they are not using, could I make a deal with you?
Thanks everyone.

Dan

I have been running 4 strokes for years and I do not use the feeler gauges to set the valves. I have used this method for years and it works for me.

Rotate in the direction it runs until one of the valves is fully depressed. Set the other so there is detectable clearance when you move the rocker arm. Then continue to rotate the engine until the other is depressed and set the other valve like the first one. Your done enjoy.

Dennis

[RAMJET]

setting to the proper clearance is very important ,as clearance changes the valve timimng ,it will run with a gestimate but not it's best.loose valve clearance will give better torque & less rpm /tight clearance will give higher rpm lower torque,not enough clearance and you will burn the valves & seats ,too mutch and you damage the valve stems and cam shaft lobes & lifters from hamering.manufacturers settings will be best .Roger

[Guest]

Originally Posted by RAMJET

setting to the proper clearance is very important ,as clearance changes the valve timimng ,it will run with a gestimate but not it's best.loose valve clearance will give better torque & less rpm /tight clearance will give higher rpm lower torque,not enough clearance and you will burn the valves & seats ,too mutch and you damage the valve stems and cam shaft lobes & lifters from hamering.manufacturers settings will be best .Roger

The only way cam timing can be changed is physically do so by changing the relationship between the cam and the crankshaft. You will not develop more torque by too much clearance. You will however loose power because the valve is not staying open as long nor lifting as much. Same goes for valves that are too tight not letting the valves seat properly allowing combustion gasses to pass between the valve face and seat which may cause damage

Here is a little test for you. Set the intake valve at .0015 and the exhaust at .004. Feel and look at the play when you move the rocker. Once you get a feel for it try setting it without the feeler gauges. With a little practice you will be able to set it easily. Most people end up setting the valves to tight as they cannot determine by feel that they are actually compressing the valve spring especially if it is in an awkward position. If you do use a feeler gauge at least check afterwards that there is some play between the rocker and valve stem. I cannot count the number of times someone has asked me to look at their engine because it hasn’t run right since they last set the valves only to find no clearance at all.

I’m not saying my way is the right way but it works for me. Some have even checked my adjustment with feeler gauges after I have set them and they fall right around the mean of the valve lash clearance.

Dennis

[RAMJET]

so you are saying if you reduce valve clearance the valve will not open sooner & close later and if you increase clearance it will not delay valve opening and close early .so if you open and the valve sooner you don't reduce compression stroke,and if you open them later you don't increase compression stroke.actually this is exactly what happens.

the cam lobes have leading and trailing ramps the tighter the valve adjustment the sooner the lifter starts to go up the ramp,this can be easily mesured with a degree wheel & dial gauge I have to do it all the time on my HI preformance car engines.you can change the timing as mutch as 8 degree with just valve adjustment ,that is huge .believe it or not the manufacturer has thought this all through(that is why there is a spec).you really don't need to understand why.but I thought I would offer some of the fundamentals to help guys understand .but set them with your fingers if you like LOL Roger

PS : I never said you would not loose power with loose valves I said you would increase the torque & torque is not the same as HP. and with them tighter the motor would be able to turn faster but that does not mean it can turn a bigger prop,just means it's timed to turn faster.to set the valves bang on gives the best of both worlds .most guys don't understand the how mutch effect on timing there is with poor adjustment,like your self you thought there was no effect .or do you think it looses power just because there is a big gap .

[Guest]

Is that 8 cam or crank degrees.me thinks someone is quoting something they read in a hotrod magazine.



Dennis

Pm sent to you.

Dan