Tuesday, June 27, 2023

O.S.SPEED R21-M05 Minicars Marine 3.5

Introducing the new R21-M05 Minicars Marine 3.5 engine made by O.S.SPEED!

Note, this special edition is only available in Europe through Minicars Hobby Distribution AB's B2B dealer network.


  • Newly developed O.S.Speed black crankcase with Minicars Marine Laser Engraving
  • Black anodized water cooling head with Minicars Marine Special Edition Laser Engraving
  • DLC coated & balanced "SG-type" crankshaft (4.5mm balance weights)
  • 9-port cylinder liner with 3-port exhaust
  • Backplate with steel thrust plate for lower friction and increased durability
  • No carb included - choose your own carburetor (15mm diameter neck)

Suitable for competition boats (experience level ”high”):

  • Hydroplanes
  • Offshore (with gear deduction)
  • Endurance (with gear reduction)

Recommended fuel:

  • Hydroplanes: 25-60% nitro fuel with 8% Klotz Original Techniplate + 8% Klotz Benol oil
  • Offshore: 16-40% nitro fuel with 8% Klotz Original Techniplate + 8% Klotz Benol oil
  • Endurance: 16-40% nitro fuel with 8% Klotz Original Techniplate + 8% Klotz Benol oil
  • Don't run the engine with less oil than the above recommended levels. You may add more recin/castor oil (Klotz Benol) in extreme conditions and heavy loads.


  • Displacement: 3.49cc
  • Bore: 16.08mm
  • Stroke: 17.2mm
  • Crankshaft diameter: 14mm
  • Practical r.p.m. Range: 4.000~43.000
  • Output: 2.76hp @ 35.000r.p.m.
  • Weight: 265g
  • Water Cooling Nipple Thread: M5


  • O.S.Speed R21M05 Minicars Marine Engine
  • RP7 Glowplug
  • O.S.SPEED decal
  • Printed Manual & partslist

Click Here

Monday, September 20, 2021

Tuesday, December 17, 2019

New IMPBA D-Hydro (45) SAW Record

IMPBA D-Hydro (45) SAW 2019 Record

Martin Truex Jr sets a new IMPBA record in D-Hydro (7.5/45) = 135.3 MPH / 217.74 KMH

Sunday, October 13, 2019

Höstmöte & RC Båt Träff 2019

Höstmöte Offshore & Hydro samt R/C Båt Träff 2019

  • Datum: Lördagen den 23:e November 2019
  • Plats: Minicarshuset Enköping
  • Samling: 09.30
  • Start: 10.00
  • Lunch: Om ni önskar lunch så kostar den 140:- i kontanter eller Swish - Notera att i lunchen ingår även fikat under dagen
  • Anmälan: Obligatorisk (och bindande vad gäller lunchen). Anmäl er senast Söndagen den 17:e November till niklas@minicars.se – var god notera vid anmälan hur många ni kommer och hur många lunch ni önskar.

Dagordning (provisorisk):
  • 09.30-10.00: Ankomst fika/frukost
  • 10.00: Sektionsmöte Offshore & Hydro
  • 13.00: Lunch
  • 14.00: Fortsättning av mötet och efterföljande R/C Båt snack tills vi tröttnar...



O&H sektionen - Mattias & Lelle

Thursday, September 5, 2019

Mikael Sundgren 1950-2019

We have lost a big RC boating profile!

Wednesday August 21 we lost my friend Mikael Sundgren after a short illness.

I've known Mikael since the mid 80's when I shifted to hydroplane RC boats from racing off-shore boats before that. After we booth made a comeback to boating some 13-14 years ago, me and Micke have shared many trips to the ponds and races around Europe. He was the one I discussed technical solutions with whenever I had some doubts or that I just wanted his opinion.

He has also been very helpful and influential in the development and testing of all KEP's boats.

I've lost one of my best friends.


The funeral service will be held at Pilgrimskapellet in Järfälla Wednesday September 18 at 13.30.

More info of the funeral service can be found HERE

Friday, April 26, 2019

Invitation Swedish iMBRA H&O League 2019

Here is the invitation to the Swedish iMBRA Hydro & Offshore League race in Oxelösund end of May.

The race includes:

• iMBRA H&O League
• Nordic Champs 2019
• Swedish Champs Race 2
• NC2 (Norway Cup Race 2)