60 vs. 72

[3900tc]

I have a 3320 and almost ready to buy a mid mount deck. My yard is flat. The dealer is telling me that the 72" is too big for that engine. John Deere says it will do the job. Looking for feedback.

 

[tcartwri]

I take it you're driving it off the mid pto, then yes it is possible it doesn't have enough torque for the 72" deck. Depends on the type of grass you're cutting as well. I have areas in my yard that I have to slow to a crawl with a 26hp / 48" deck. Everywhere else I can go at top speed.

 

[murphy1244]

5 pto hp for every foot of blade.

 

[46andtool]

That's odd. I remember back when you could get a JD 855 with a 72" MMM. I believe it had ~19 PTO Hp.

 

[murphy1244]

That's odd. I remember back when you could get a JD 855 with a 72" MMM. I believe it had ~19 PTO Hp.

MMM Spin a lot faster than rear pto, I should of disclaimed that sorry.

 

[kuboman]

I have run 72" with 22 hp for years and it runs it just fine. If you are going to cut 6" tall grass then it will be really slow but for normal grass cutting, no problem.:thumbsup:

 

[BRBurns]

I have a 4300 with the 72" MMM. Handles it just fine. If I go fast enough, up hill, with a heavy grass load, it can pull the engine down. But overall it is a good match for that tractor. Yours should be similar in HP

 

[John_in_TN]

I had a JD 4200 (about 22 PTO HP) with the 72" mmm and used it for about eight years to mow my yard. The setup cut extremely well with no power issues for normal lawn mowing. I did mow a few overgrown areas where I had to back-off a little just to get the grass to clear the deck chute. The tractor had enough power to slip the belt on the deck if the deck clogged in that heavy stuff.

 

[bill1369]

I have 3320 with 7-iron 72 Inch MMM. LOVE IT!! Never had any bogging down issues. I also have a 2320 with a 54 Inch MMM and with the same grass I cut with the 3320, I would stall the 2320 out quite frequently. I am very happy with my 72 In on the 3320.

 

[3900tc]

Thanks for the great input.