MR1 engine not running more than 6000 RPM at times

The port side engine would not rev above 6K rpm for the first hour of the trip. At times it reved up to the equal rpm of its twin, starboard energize, for a ...

MR1 Engine drops in RPM then dies - Yamaha Jet Boaters

Replaced coils and plugs, dealer is uncertain if replacing the ECU will fix this problem and is suggesting cleaning the throttle body. Any ...

What would happen if a car had lots of torque, but not much hp?

... then it feels more "punchy" at those revs. TLDR; Read it! Its ... run the engine at higher rpm. Sorry if this doesn't make sense, It's ...

Sea Doo Challenger intermittently RPM surges

Ran great, winterized it. At first sea Doo would not go over 6000 rpm. And sputtered at lower rpm ... Start and rev the engine up to 4000 RPM ...

Z drop while Baseplate Surfacing - MR-1 - Langmuir Systems Forum

... than the back with no z change. I checked ... more than .005" for long cutting operation. Has ... Update Letting the spindle run for 2 hours at 6000 rpm ...

Re: Langmuir MR-1 spindle servo - 8000 rpm - MYCNCUK

... motor/driver or learning how to get it running. ... Ok well the spindle in the Langmuir is more than likely a custom setup that is in 2 parts.

track tested MR1/KRE--IA2/BUTLER [Archive] - PY Online Forums ...

The 350cfm heads would make more power than the ... engine running 11.50s-11.20s even on pump gas? My ... Say you make 20 psi of boost at 6000 rpm.

WO2003095823A2 - Constant-speed multi-pressure fuel injection ...

... engine is not doing much work other than keeping it alive. ... engine is running at about 6,000 rpm. Fuel in ... more than one millisecond. This sets the ...

Freestyle - Xscream & DASA What's coming next.. | Page 3 - X-H2o

... more hp then my buddies carb version, same motor. I am not saying ... MR1 engine that likes to spin at 10,000 rpm. A Wankle spinning at ...

Yamaha FX1000 does 8000 RPM but only 34 KNOTS, any help...

If so your RPM's are too low. You should be able to get 10,000 RPM + on the MR1 motor. This should get you around 47 Knots. 8,000 RPM and ...

Any downside to running WOT for extended periods of time? - Page 2

... not putting much more burden on the motor, just burning more fuel. ... 6,000RPM limit, you aren't actually running at redline. I'd wager ...

MR-1 CNC? : r/hobbycnc - Reddit

It cuts aluminum more easily than my old onefinity router cut wood, and I've machine hard tool steel (in its hardened state) with no issues ...

MR1 Low Compression - Forum - GreenHulk

If you did a "cold" compression check after not having it running for a month or more...I recently had this same motor on a yamaha FXHO give low ...

Quick question maybe you guys can help with - Club Bennington

Most 115 hp engines correctly propped running at 6000 will go as fast as you are going. Again, if the engine is running fine then you ...

track tested MR1/KRE--IA2/BUTLER - PY Online Forums - Bringing ...

... engine running 11.50s-11.20s even on pump gas? My guess is the 317cfm heads had more velocity and made more torque though out the power band than the 350cfm ...

Yamaha MR-1 High Output 4 Stroke engines | Boating Forum

The longer times between flushing the faster the salt will damage ... Proper flushing of the engine is not possible with the boat in the water.".

4000 rpm max, impeller too big or other issues?

... not letting the engine run on the cam, big cams need big carbs . went to a 950 cfm then a dominater, the boat runs in the 6000's rpms now