I own a stock 7710 w/a Denso mechanical pump. How would I go about changing the injection timing for more power and adding more fuel? I just dynoed the tractor at 157hp but I know that these engines can make up to 300+. This will not be a pulling only tractor but I wanted to play with fuel and timing to get the most out of it in stock form. I also have a straight pipe on it. Thanks for your time.
JD 7710 timing and fuel
- Thread starter firels1
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beenthere
Super Star Member
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- JD_4x2_Gator, JD_4300, JD_425, JD_455 AWS, added JD_455, JD_110, JD_X485(sold)
:welcome: to TBN
Your plans sound very interesting, and hope to hear more about how you go about the plans and some pulling results. We like pics and videos...
Your plans sound very interesting, and hope to hear more about how you go about the plans and some pulling results. We like pics and videos...
Tx Jim
New Member
Welcome to TBN
It's possible the clutch & drivetrain won't like 300+ HP & fail.
It's possible the clutch & drivetrain won't like 300+ HP & fail.
thepumpguysc
Elite Member
You remove the tamperproof plastic cover on the back of the governor.
Remove the 4 bolts on the cover.
Under the cover you will see a small screw & nut at the bottom. 10 or 12mm nut.
PAYING ATTENTION to where the screw flat is.. loosen the nut and screw the screw *in* 1/2 - 1 turn.. and lock the nut down.
KEEPING IN MIND> you can do serious damage to your engine by overfueling it.. 1/2 turn isn't going to melt it but 1 turn and your rolling black smoke.. overfueled.
Best to put it on a dyno to see what your results are.. find you max hp and back it down 1/2 turn.. that way you'll have some reserve when you really need it..
Remove the 4 bolts on the cover.
Under the cover you will see a small screw & nut at the bottom. 10 or 12mm nut.
PAYING ATTENTION to where the screw flat is.. loosen the nut and screw the screw *in* 1/2 - 1 turn.. and lock the nut down.
KEEPING IN MIND> you can do serious damage to your engine by overfueling it.. 1/2 turn isn't going to melt it but 1 turn and your rolling black smoke.. overfueled.
Best to put it on a dyno to see what your results are.. find you max hp and back it down 1/2 turn.. that way you'll have some reserve when you really need it..
thepumpguysc
Elite Member
There are timing adjustment screws in the drive gear infront of the injection pump..
