cowl adjustment

My F30 cowl rattles at certain rpms. Would someone be kind enough to tell me how to adjust this?

Sometimes the glue that was used to fasten the rubber gasket that resides along the entire bottom edge of the cowling comes unglued and the cowling can rattle a bit. If you can pull that gasket off, any marine silicon-based sealant can be squirted in there or even some Epoxy if you have it laying around that can be mixed can be squirted or brushing inside that gasket and then placed back on the cowling. (this assumes your cowling gasket has come lose of course)

That is not the problem. Any other suggestions?

Are you certain it's the cowling that is causing the rattling and not something inside the cowling? Is the prop in perfect shape? If the rattling is only happening at certain RPM's it could be caused by something out of balance that is creating a harmonic vibration at certain RPM's. Can you grab the cowling while it is fastened down and move it at all or is it snug and tight in place?

It could be the prop, it is dinged up. If I press down on the cowling really hard in quietens down some. But

deepsea21 said:

Are you certain it's the cowling that is causing the rattling and not something inside the cowling? Is the prop in perfect shape? If the rattling is only happening at certain RPM's it could be caused by something out of balance that is creating a harmonic vibration at certain RPM's. Can you grab the cowling while it is fastened down and move it at all or is it snug and tight in place?

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I'd usually say take the prop to your closest dealer and have it reconditioned if it is an expensive prop. On an F30... It's not an expensive prop. Take it in to your local dealer and see what they charge to send it out and have it reconditioned. It probably won't cost that much more than buying a new one. Maybe they give you a few bucks credit for it againt a new prop purchase. Reconditioning small props can cost about as much as buying a new one. Your vibration is coming from somewhere and with a dinged prop that could be the source. Worst case it isn't the source but you'll have a nice prop again that doesn't cause wear and tear throughtout the drive train.