F16d maximum RPM

reggis · Dec 31, 2012

My yanmar f16d has maximum engine rpm 2300? Is that normal or it should be higher?

Jimbrown · Dec 31, 2012

Well the N1 is probably about 6000 and the N2 at least 12000.

scottlw · Dec 31, 2012

Hi, i have a F18D and i think max RPM on this is around 2600, dont know if this helps? I think 540 PTO speed is around 2300-2400, if 540 PTO speed is higher than 2300, then i would of thought it should be higher?

winston1 · Dec 31, 2012

Jimbrown said:
View attachment 295534

Well the N1 is probably about 6000 and the N2 at least 12000.

The F16D is a tractor, not a jet. Reggis, where are you getting the 2300 maximum speed? Red line on the tach? Manual? Won't run any faster? I agreee the 2300 sounds a little low so that is why I am asking.

284 International · Dec 31, 2012

I have found a post here that states the PTO RPM of a YM1610D is given at the engine's rated speed, 2500 RPM. The F16 and 1610 share the same engine, the 3T75 series. I imagine that would be a safe setting for your machine.

If there is a tick mark on the tachometer in the 2300-2500 RPM range I would assume that is the PTO RPM. Maximum engine speed will be a bit higher than that.

If, as Winston asked, it will only run to 2300 RPM at maximum throttle, I would look into making sure the linkage is operating freely from the lever and its affiliated brackets to the governor before making any adjustments to components.

reggis · Jan 2, 2013

The engine is runing freely, no PTO and the all gears are off. Throttle is thight and its on maximum but I can't get more than 2300 rpm.

284 International · Jan 2, 2013

What markings are on your tachometer? Is this tractor reconditioned? If so, it may have a different tachometer than it should, and the engine is actually running at a higher RPM than indicated.

If the engine has good power and seems to function fine otherwise, I wouldn't worry about it too much.

winston1 · Jan 2, 2013

What is the maximum reading on your tachometer? Just wanting to confirm the beast should run faster than 2300. I believe it should. When you put your throttle wide open can you then take your hand and at the injector pump move the arm causing the engine to accelerate? I don't have a clue how to make adjustments on your f series but I do feel there are some that can be made. If you aren't satisfied you might consider the f series repair manual

Might want to consider one of these to confirm your tach is correct. http://www.harborfreight.com/digital-photo-sensor-tachometer-66632.html

California · Jan 2, 2013

I have had an inexpensive tach for years that works great for this. There's probably a used one on Ebay under $10.

search on : briggs and stratton 19200 tachometer. Or vibra tach. As you turn the dial on the face, the wire emerges and vibrates when it matches engine speed. Then read the scale. This is Old School technology - no battery, unharmed if dropped.

(stock photo off Google Images)

reggis · Jan 3, 2013

Tachometer is original and the power of tractor I believe is good. But I cant check what you told me because tractor is not in reach for now until spring. Thank you for your help.

scottlw · Jan 5, 2013

Found these pics while surfing, so they are not mine, so looks like it the RPM should be higher.

While using my F18D today, max rpm appears to be 2550rpm

reggis · Jan 8, 2013

So I understood thar rpm should be higher. But how i should adjust the maximum rpm?

winston1 · Jan 8, 2013

I would first make sure your tach reading is correct. Unless someone on here has an F series manual and is willing to share you may have to invest in one.

scottlw · Jan 8, 2013

I have a F series user guide, what should i look for Winston?

winston1 · Jan 8, 2013

scottlw said:
I have a F series user guide, what should i look for Winston?

Governor adjustment. But I don't think it will be in the user guide. I think he will need access to a repair manual. Don't know all this, just speculating. :2cents:

284 International · Jan 9, 2013

I would really not mess with governor settings until it is established the engine isn't running at the proper RPM. While it may not hurt anything to run it over rated speed, it cannot be better, either.

reggis · Jan 10, 2013

My reading is correct becouse before the repair the maximum rpm was 2500.

284 International · Jan 10, 2013

What repair did you do that may have changed the governor setting? I don't have any information I'm not sharing, but if you did something that may have changed how the engine runs, I would go back and assess that first.

The other thing to try is to manually move the throttle lever where it enters the injector pump or governor and see if the linkage isn't delivering full movement. There may be a stuck pedal, bent piece of linkage, or something else that is keeping you from getting full throw on your throttle control.

reggis · Jan 12, 2013

The fuel pump vas cleaned. I adjusted the screw near the pump, so I believe I should adjust it again, but I don't know how to adjust it.

winston1 · Jan 12, 2013

I take fuel pump to mean injection pump? Why was the pump cleaned? Sticking? Picture of the screw possible? Did the screw have a cap on it? Have you tried slowly moving the screw closely watching the results? Don't guess you have if the tractor is not in reach until spring.

The group of parts associated with ref 16 in the parts drawing is the limiter shaft assembly on a 1510. Your screw anywhere around that area? http://www.hoyetractor.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=HTE&Category_Code=YM1510GOV