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Raising rpms on 17hpKaw

6'7 330

LawnSite Bronze Member
First get a tach, tiny tach is a very good one. Up front behind the air filter housing and around the carb area, there is plate. Their are two 10mm bolts attaching the plate to the engine ,loosen the two 10mm bolts and lift up on the plate to raise the rpm’s.
 

bntt68

LawnSite Senior Member
Location
Central Illinois
I was also wanting to do this on my 19 hp kaw.
 

MBDiagMan

LawnSite Senior Member
Location
NE Texas
As 6'7 says, loosen the plate bolts and move the plate to adjust the RPM. Make sure you recheck it after tightening the bolts.

I think this will be the method on most any Kawi engine. I would not go beyond the factory RPM setting for your engine model. It will shorten engine life. That said there is usually 75 RPM tolerance, for example 3,600 +/- 75RPM. In that case set it at 3,675 but no more.

There are many folks here that run higher RPM than recommended. Some will get lucky, and others will eventually have a broken connecting rod which will totally hand grenade the engine.

SOooo... it is your decision as to whether or not to exceed recommended RPM but be prepared to accept the consequences like a big boy if it comes apart.

Good luck,
Doc
 

EXspyguy

LawnSite Member
Location
worldwide
15, 17 and 19 are all the same engine except the carb and the only difference there is how far the govenor is allowed to open the throttle plate. If you look at where the lever on the butterfly stops, cut some of that away to allow it to travel further thus increasing power.
 

Restrorob

LawnSite Fanatic
EXspyguy said:
15, 17 and 19 are all the same engine except the carb and the only difference there is how far the govenor is allowed to open the throttle plate. If you look at where the lever on the butterfly stops, cut some of that away to allow it to travel further thus increasing power.
Why cut on the carb. if there is a procedure for adjusting it ?
 

Restrorob

LawnSite Fanatic
EXspyguy said:
it is not just an adjusting screw. It's more of a tab that needs to be cut back.
Check out this attachment, This is the proper way to adjust high speed RPM.
Using this method one can set RPM up to 4000 or more if wanted, I still don't understand the need to cut anything on the carb. ???
 

cborden

LawnSite Member
Location
46140
I have one question, when you reset the high idle on the engine. Is the new high idle setting, set at a no-load high idle, high idle with the blades spinning or is it set with the engine under a normal operating load and at normal operating temp ie. cutting grass and running the hydro pumps? I was once a heavy truck / machinery mechanic, and we set the high idle RPM on a dyno to achieve a true setting. All six of my machines need to be turned up and I was just wondering. I'm getting the tachs for all six.
 
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