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Thresher

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Posts: 25
Reply with quote  #1 
2007 E150DPXSU
Serial# 05169536
Noticed a strange noise coming from the motor last night at around 1000 rpms while in gear. Engine was warm and had been run for 45 min at all RPMs. It sounds more or less like a muffled, dull Rattle or knocking. My first thought was that it might be the lower unit but when I took the cowling off and and had my son run it in gear at 1000 RPMs it seemed to be coming from the area where the mid and upper section come together but more on the upper section side. Couldn't replicate the sound in idle, only in gear and only around the 1000 RPM range. In all other aspects it ran great. Has anyone experienced this before or have an idea what this noise may be? It's a pretty audible noise.
dena628

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Reply with quote  #2 
Your not alone, had same problem last fall a couple of times. Not sure if it was 1000 rpm but it was low rpm and was intermittent. Have not run boat yet this year so will see what happens.
Any help from the guys smarter than me would be appreciated.
steelhead

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Reply with quote  #3 

Try to pinpoint the noise with a short section of garden hose as listening device, keeps ones delicate face and fingers away from the flywheel

Check the upper mount for broken corroded loose bolts and worn rubber cushions


Drop the lower unit and check the top splines on the driveshaft, these splines must be greased with moly grease every service preferably once a year.

Thresher

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Reply with quote  #4 
Took the cowling off and now hear a metallic "clang" coming from the flywheel area. Not the same sound as the "knocking ", which I do now hear in idle as well as in gear. Taking it in to the dealer Monday.
seahorse

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Reply with quote  #5 
It may be a good idea to remove the flywheel and inspect the magnets, stator, and the studs. Perhaps first check the lower unit oil and magnets for excessive metal.
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Thresher

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Reply with quote  #6 
If I remove the flywheel will the timing be affected?

Edit: reading the shop manual now
Thresher

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Reply with quote  #7 
2007 E150DPXSU
Serial# 05169536

Finally got word from the dealer.  They got as far as the flywheel noise and didn't want to go any further with checking the other issue for fear of causing more damage to the flywheel/stator/etc..  As it is, there is a loose or missing magnet (I can't remember which he said) on the flywheel and no other damage. They pulled the flywheel  and called BRP to see if I could get any consideration on  pricing for a new flywheel but BRP said no.  The price they quoted me for the new flywheel is $811, not sure what they are charging me for labor because I am having other work done.  To replace the flywheel, water pump and all the lower unit seals (when I pulled the magnets for the LU oil, which only had 2 hours on it, was already milky but no metal, nothing at all on either LU magnet screw) the total is $1,400 and change.  They checked pressure and vacuum on LU and it failed. They also performed a compression test on engine and all was well although I didn't get the numbers yet.  I asked them to check the fuel system pressure/vacuum/fuel pump while they are at it. There were no codes when connected to the software.  Once this is done they can rev it up in gear to 1,000 RPM's and check the muffled "knocking" noise I heard that started all this in the first place.
Thresher

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Reply with quote  #8 
Wanted to update so anyone else researching this topic would have the info.  I got the boat /motor back last night.  They replaced the flywheel, changed the lower unit seals and installed a new water pump.  Total bill was $1,402 and change.  I was able to launch last night and take it for a spin and it ran great.  I could not reproduce the rattle/knocking sound (neither could the dealer).  I'll be able to run it more this weekend to make sure everything is ok.


steelhead

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Reply with quote  #9 

Check your boat/motor for any spray hitting the motor running at different speeds/wind and wave conditions.  Should be no to very little water spray hitting the motor above the lower unit.  Salt water spray sucked into the motor cowling is death to motors.

Boat/motor used in salt or brackish waters?

Most of us salt water outboard owners spray down the engine under the cowling with a fine mist of fresh water or fresh water with SaltAWay and let air dry.  Only light low pressure spray and don't directly hit the wiring connectors or electronics.

Several times a year, we spray down the motor with a water corrosion protective spray, BoeShield, CRC 656, Corrosion X, PB Corrosion Block, Fluid Film.  Take your pick or talk with your motor service shop about which one they like best.  Some leave a gooy sticky surface that techs don't like dealing with.

I spray BoeShield T9 even up under the flywheel lightly coating the magnets and stator.  No problems

Hi_c

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Reply with quote  #10 
All must be well, since posting. Glad you got it fixed.

I second the Boeshield spray. That stuff is good at protecting electrical connections from water.

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2017 Tidewater 1910
Evinrude ETEC 150 HO
Model: E150HGXABH
Serial: 05500627H
Mfg date 06/17
Hi_c

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Posts: 98
Reply with quote  #11 
All must be well, since posting. Glad you got it fixed.

I second the Boeshield spray. That stuff is good at protecting electrical connections from water.

__________________
2017 Tidewater 1910
Evinrude ETEC 150 HO
Model: E150HGXABH
Serial: 05500627H
Mfg date 06/17
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