stock zenoah 26?

Bruce Clark · Apr 19, 2016

My question is about a stock Zenoah my brother has in a classic round nose. Just curious if the engine has a lot of drag on the seals on a fairly new engine. It runs pretty good but when its not running the engine seems hard to turn over compared to nitro engines. I know they have different seals you can put in the motors but in that class I don't think its legal. When the engine was new I found the coil was dragging on the flywheel. Am I over looking something simple? Thanks for any advice and help

Ron Olson · Apr 19, 2016

They will. Remove the stock pull-starter and replace it with a genuine Zenoah EZ- Starter. I've tried the other brands and most are junk. It's well-spent money and will make starting the engine so much easier. I don't know how I went so long without one.

If the coil is hitting the flywheel in one area only, it could have a twisted crank. They are not welded, just press-fit into place. All of the manufacturers dropped the ball on that area as they could have easily been spot welded. I just had to replace one a week ago. Usually it's from using the piston stop tool and trying to over tighten the collet or starter cup.

I got the EZ-Starts from www.gizmomotors.com with probably the best prices around for them.

Don Brown · Apr 20, 2016

I have one stock 26 motor that the flywheel was hitting the coil new out of the box. Bring it by sometime and I will look at it.

Bruce Clark · Apr 20, 2016

Thanks for the information and I'll see if I can get the boat from Doug and come visit you Don. I'm just trying to get him up to speed.

lohring · Apr 20, 2016

We've done a lot of testing with stock engines. We also did a series of tests where we could see the power increase caused by break in over a series of runs. See below.

Lohring Miller

Bruce Clark · Apr 20, 2016

He is running Coleman fuel and Morgan oil. What is the difference in 87 Otto and just 87 Octane?

lohring · Apr 22, 2016

87 Otto was the 87 octane no ethanol gasoline with Otto synthetic oil. Both runs were made on the same M&D engine with that fuel mixture at the beginning and after around 40 inertial dyno runs. The graph shows power from 3 runs averaged together. Each inertial dyno run is around 8 seconds of full throttle from 12,000 rpm to 18 or 19,000 rpm. See below for the full article.

Lohring Miller

Gasoline.pdf

stock zenoah 26?

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