LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start

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LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
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Price: $158.99

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The LRP Nitro Engine ZR.28 Spec. 4 Pull Start features many updates compared to the Spec. 3 nitro engine. The pull start, cooling head and carburetor slide have all been improved to provide more power and durability. While this engine is a .28 it will fit in a .21 engine mount allowing for a wide range of uses. Package includes one nitro engine, one R5 glow plug and one collet.

Features:
  • Big block size
  • Updated cylinder head
  • XTEC 15S-2 carburetor
  • LRP Platinum/Iridium R5 glow plug included
  • XTEC T6 engine housing
  • Ultra strong pull start
Specifications:
Class: 1/8th Offroad Buggys/Truggys
Displacement: .28 (4.57cc)
Bore: 18.50mm
Hub: 17.00mm
Power: 3.93 HP
RPM: 33,900 RPM
Ports: 5 + 1
Glow Plug: LRP Standard R5 (LRP35051)
Carburetor: XTEC PowerCarb3 15S-2 with 9mm Venturi
Weight: 420g

This product was added to our catalog on July 13, 2021

Keith Morgan
Friday, Nov 26 2021 (about 2 years ago)
LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
GREAT ENGINE GOOD POWER AND RPM. BREAKS IN AND TUNES GOOD. I'M RUNNING THIS ENGINE. IN MY 1/8 SCALE KYOSHO GT2 AUDI SPORT BODY. RUNS NICE.
Bruce Chisholm
Verified Owner
Thursday, May 12 2022 (about a year ago)
LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
Very good product and arrived on time. Have always had good service with AMain Hobbies. Would recommend them to anyone. P
Roman Dmytriyev
Verified Owner
Wednesday, Oct 13 2021 (about 2 years ago)
LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
Great engine has lots of power. The only downside is the pullstart, it broke on the 4th start but other than that no complaints.
Mark Shorey
Verified Owner
Tuesday, Aug 8 2023 (8 months ago)
LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
I am 60yrs old now. Been in this hobby for 42yrs. Bought this engine and installed in my Revo.
Tried to get running for 3 days trying everything I knew to do.
Bottom line I found out "ALOT" of people having the same issue and ALL of them was complaining about the Carburetor!!
I called Amain Hobby and explained my issue.
THANK YOU Amain Hobby as they sent me a "NEW" Carburetor that comes on the LRP .32
WOW..My Engine Started right up and idled for the first time since I purchased.
"THANK YOU" AMAIN HOBBY FOR TAKING CARE OF ME!
Dylan Miller
Verified Owner
Tuesday, Aug 1 2023 (8 months ago)
LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
Great engine, crappy carb. There are a plethora of online forums and videos with people complaining about the XTEC carbs. There’s a reason - they’re horrible. They won’t get you at a good tune. It seems wild that it is still sold, but it’s true. The cheapest fix is a Hobao E30020 carb at $40 from Hobao USA. Next thing I’d try is Protek’s PTK-2617 carb at $120. The protek venturis fit in the Hobao carb too, so you can use them. Note the Hobao comes with a 7mm carb stock. Most Novarossi carbs fit too but Novarossi is out of business. The engine runs well with a good carb - idles fairly, revs well, has torque, runs cool. As always, make sure you preheat the engine before every run. I’m running this in my custom nitro Tekno MT410 build and it’s a great fit. My engine had no loose flashing or anything on its internals upon unboxing. Would buy again. Just with the Hobao or Protek carb.
Andries Buskens
Verified Owner
Tuesday, Jun 6 2023 (10 months ago)
LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
So you heard $160 and think it’s not like the best engine or thing/ item you could buy ever! Roto start back plate with the bit and a nice drill! They idle like advertised! And ripppppp! Tons of torque! Ride it out past break in, it will be sluggish for the first 8 tanks. Not too sluggish, but man is it ever a no brainer. Tons of compression and a nice exhaust tone!
Jeremy M
Verified Owner
Sunday, May 14 2023 (10 months ago)
LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
Great engine. Super easy to tune, very powerful. Highly recommend.
Daytona
Verified Owner
Saturday, Nov 25 2023 (4 months ago)
LRP ZR.28 Spec. 4 Nitro Engine w/Pull Start
I installed this .28 LRP in a 1/8 scale Serpent cobra GT on road touring car ,using a Dynamite tune pipe-been running TNR 20% and geared it low -I’m blown away how well this engine performs with 103 mm wheels - engine has its own sound , carb tuning is basic and mid range power is spot on -bought a .Lrp 21 but it’s still in the box …super happy with this engine - Note: I
Did loose the pull starter and converted it to bump start from day one….