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#11907255 - 10/29/16 06:56 PM Blown lower unit or Rod?
Snook20 Offline
Angler

Registered: 04/10/11
Posts: 338
Loc: Tyler
Ive got a 1982 OMC evinrude 35hp on my aluminum boat that has run like a champ for a year now. the only issue ive had is the seals wearing out fast and letting water in the lower unit. last week I started hearing a knocking sound while in forward gear that would get faster as you increase the throttle. I couldn't tell where exactly it was coming from but it sounded more in the midsection down towards the lower unit. anyways yesterday I went out again. the knocking got louder and louder until the motor started loosing rpms so I throttled down and throttled back up then i heard this god awful crack/breaking sound followed by the sound of something broken loose being tossed around. this was about 3 seconds then I slammed her back in neutral. luckily I was able to idle back to my boathouse. after I pulled her out of the water i drained the lower unit oil i had just replaced and it looked terrible with a side of water. So based on the early symptoms and the final breaking noise does this seem like more of a Lower unit or blown rod problem?

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#11907563 - 10/29/16 09:56 PM Re: Blown lower unit or Rod? [Re: Snook20]
Dawson Hefner Online   content
Extreme Angler

Registered: 09/10/09
Posts: 2812
Loc: Brownsboro, Tx
You need a new lower unit.

Sucks, been there done that more times than I want. You may be able to fiND a used one that will just bolt right up.
_________________________

www.texasmegafishadventures.com for guided rod and reel alligator gar angling
Licensed Guide Dawson Hefner
903-721-4296

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#11907798 - 10/30/16 07:44 AM Re: Blown lower unit or Rod? [Re: Snook20]
Gamblinman Offline
Extreme Angler

Registered: 11/26/02
Posts: 2368
Loc: Yantis, TX
Based on what you've told us, I would suspect the lower unit is out.
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#11908048 - 10/30/16 11:29 AM Re: Blown lower unit or Rod? [Re: Snook20]
boatwhisperer Offline
Extreme Angler

Registered: 09/25/10
Posts: 1491
Loc: hurst, tx
if you found metal shavings in the lower unit oil I would highly suspect the lower unit but if there was no metal in the lower unit oil I would highly suspect the powerhead do a compression test
_________________________
boatwhisperer

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#11908051 - 10/30/16 11:29 AM Re: Blown lower unit or Rod? [Re: Snook20]
boatwhisperer Offline
Extreme Angler

Registered: 09/25/10
Posts: 1491
Loc: hurst, tx
if you found metal shavings in the lower unit oil I would highly suspect the lower unit but if there was no metal in the lower unit oil I would highly suspect the powerhead do a compression test
_________________________
boatwhisperer

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#11908280 - 10/30/16 02:22 PM Re: Blown lower unit or Rod? [Re: Snook20]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 10976
Loc: Littlefield Tx & Lake A. H. US...
Pull the lower unit and start it for a couple of seconds. No knock then it`s the lower.
_________________________
“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” Remember what He has done and remember that He is not done yet! GOD IS GOOD

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