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2009 Yamaha 150 hp grinding in gear

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2009 Yamaha 150 hp grinding in gear

Old 07-21-2014, 02:12 PM
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Default 2009 Yamaha 150 hp grinding in gear

I have a 2009 Yamaha 150hp in my 24' skiff. Bought the boat about a year ago. Runs great with no problems.

However, when putting in gear, reverse or forward, it seems to want to "grind" into gear more than my prior boats.

Wondering if this is common for this engine or maybe an adjustment I need to make. Friend told me it needs a different prop with a special fitting. Currently has a SS prop but don't know the size/pitch. Can't imagine why a prop would make that much difference.

Also has a "chatter" as low speeds from time to time.

Any ideas?
Old 07-21-2014, 02:19 PM
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when is the last time the lower unit oil has been changed
Old 07-21-2014, 04:36 PM
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Yes with some props they will grind into gear and have chatter. Changing props can solve the problem. But without knowing what props you have on it, hard to say.
Old 07-21-2014, 07:10 PM
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May want to check shift cable adjustment as well.
Old 07-21-2014, 07:53 PM
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Without hearing it, it would only be a guess. Don't baby it into gear, get it in there.

I have quite a bit of what I was told was "prop chatter" at idle speed. Said it was from the boat moving faster than the prop is spinning, I believe. Tried a new 4 blade prop yesterday, not a hint of it. Guess my mechanic was right, and I guess changing props can make it come and go.
Old 07-22-2014, 02:05 AM
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Changed lower unit oil this Spring.

Sounds like trying a different prop might be worth a try. Friends of mine had offered to let me try some of his props. I'll report back.
Old 07-22-2014, 03:36 AM
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Originally Posted by barnburner View Post
Without hearing it, it would only be a guess. Don't baby it into gear, get it in there.

I have quite a bit of what I was told was "prop chatter" at idle speed. Said it was from the boat moving faster than the prop is spinning, I believe. Tried a new 4 blade prop yesterday, not a hint of it. Guess my mechanic was right, and I guess changing props can make it come and go.
This. Don't put it in gear slowly.
Old 07-22-2014, 04:29 AM
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Originally Posted by jrolin1 View Post
This. Don't put it in gear slowly.
This

You need to put it in gear with commitment. My motors would do the same thing if I slowly slipped them in and out of gear.
Old 07-22-2014, 05:51 AM
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My pair of F150s will still grind at times,even putting them in gear fast with the props I am running. Tried a smaller prop for two trips last month and they shifted smooth no matter how slow you put them into gear.

While you can limit the grinding by shifting faster into gear, the correct prop will eliminate the problem all together.
Old 07-22-2014, 09:29 AM
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Thanks everyone, for some reason I couldn't imagine it being the prop, but looks like I was wrong.

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