Sound testing for snowmobiles

MARQUETTE — The Michigan Department of Natural Resources will provide free courtesy snowmobile sound testing from 11 a.m. to 1 p.m. Saturday at the agency’s customer service center at 1990 U.S. 41 South in Marquette.

DNR conservation officers also will be available during this time to answer snowmobile law-related questions.

The sound test, which takes about 10 minutes to perform, involves:

≤ Placing the snowmobile in a designated test area.

≤ Placing the sound meter 4 feet above the ground and 13 feet 1.5 inches from the centerline of the machine, on the same side as the exhaust.

≤ The operator, while holding the brake, increasing engine speed until the tachometer reaches 4,000 RPMs +/- 250, and then keeping at that speed for four seconds.

≤ Repeating the test once.

≤ Averaging the two test readings to produce the result.

≤ Any test result above 88 decibels is failing.

No enforcement action will be taken during the sound check, if the snowmobile fails the test. Snowmobile owners will be encouraged to replace the modified exhaust with the original exhaust system from the snowmobile manufacturer. This will ensure the snowmobile is compliant when on the trail.

The penalty for violating sound levels for snowmobiles is a civil infraction, carrying fines of up to $250.