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my oil looks like a milkshake :(
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cmetzenberg



Joined: 04 Jan 2014
Posts: 367
City/Region: Santa Barbara
State or Province: CA
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: Kanaloa
Photos: Kanaloa
PostPosted: Sat Nov 16, 2019 6:48 pm    Post subject: my oil looks like a milkshake :( Reply with quote

So after my run in with Katie the shark my port engine (honda bf150 2007 700hrs) was running rough. Today I inspected it and found milkshake oil. I found water in the #4 cylinder. all cylinders had spark and injection. The compression readings were:
1-210
2-190
3-195
4-180

To me this points towards a blown head gasket. What do you all think? I just did a 700 hrs service, so the oil was brand new and so was the impeller.

https://photos.app.goo.gl/PbZMNPepb7XAqpT66

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Conrad Metzenberg

07' Tomcat 255 "Kanaloa"
87' Boston Whaler Guardian 17 (BlackFlag, 03-14)
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colbysmith



Joined: 02 Oct 2011
Posts: 4522
City/Region: Madison
State or Province: WI
C-Dory Year: 2009
C-Dory Model: 25 Cruiser
Vessel Name: C-Traveler
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PostPosted: Sat Nov 16, 2019 7:57 pm    Post subject: Reply with quote

I would tend to agree. Sad
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digger



Joined: 02 Nov 2003
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City/Region: Spokane
State or Province: WA
C-Dory Year: 1993
C-Dory Model: 22 Angler
Vessel Name: C-Sik
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PostPosted: Sat Nov 16, 2019 8:15 pm    Post subject: Reply with quote

Yup. Either head gasket or cracked or corroded/failed head
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A Fishin C
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PostPosted: Sat Nov 16, 2019 9:43 pm    Post subject: Reply with quote

happen to me twice once on a 50 yamaha 4 strk and once on a 115 merc 4 strk

both times a thermostat
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digger



Joined: 02 Nov 2003
Posts: 496
City/Region: Spokane
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PostPosted: Sat Nov 16, 2019 9:56 pm    Post subject: Reply with quote

A thermostat doesn’t impact only 1 cylinder. The thermostat will add condensate to the oil, but will not make 1 cylinder wet, nor make 1 spark plug a different color than the rest.
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A Fishin C
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PostPosted: Sat Nov 16, 2019 10:24 pm    Post subject: Reply with quote

i just had water in oil
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tsturm



Joined: 01 Nov 2003
Posts: 1134
City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
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PostPosted: Sat Nov 16, 2019 10:59 pm    Post subject: Re: my oil looks like a milkshake :( Reply with quote

cmetzenberg wrote:
So after my run in with Katie the shark my port engine (honda bf150 2007 700hrs) was running rough. Today I inspected it and found milkshake oil. I found water in the #4 cylinder. all cylinders had spark and injection. The compression readings were:
1-210
2-190
3-195
4-180

To me this points towards a blown head gasket. What do you all think? I just did a 700 hrs service, so the oil was brand new and so was the impeller.


Pretty big swing between #1 & #4 not a good sign. Head gasket is my guess.
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cmetzenberg



Joined: 04 Jan 2014
Posts: 367
City/Region: Santa Barbara
State or Province: CA
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: Kanaloa
Photos: Kanaloa
PostPosted: Sat Nov 16, 2019 11:12 pm    Post subject: Reply with quote

Head gasket would be the best case scenario at this point. While attempting to get boresights of the cylinder walls a mirror on the endoscope broke off and is in the #4 cylinder...eh, the heads are coming off anyways. I was hoping to get a look at the cylinder walls and see how they looked.
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tsturm



Joined: 01 Nov 2003
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PostPosted: Sun Nov 17, 2019 12:06 am    Post subject: Reply with quote

cmetzenberg wrote:
Head gasket would be the best case scenario at this point. While attempting to get boresights of the cylinder walls a mirror on the endoscope broke off and is in the #4 cylinder...eh, the heads are coming off anyways. I was hoping to get a look at the cylinder walls and see how they looked.


You will have a great view now! Wink
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tsturm



Joined: 01 Nov 2003
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PostPosted: Sun Nov 17, 2019 11:32 am    Post subject: Reply with quote

ck crank end play, be less work, 4 mounting bolts couple wires & cables.
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cmetzenberg



Joined: 04 Jan 2014
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City/Region: Santa Barbara
State or Province: CA
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: Kanaloa
Photos: Kanaloa
PostPosted: Mon Nov 18, 2019 7:09 pm    Post subject: Reply with quote

Well, I got the worst news; my headgasket wasn't the issue. The issue was the engine had overheated repetitively. I don't understand this as i rarely get overheat alarms. Every now and then kelp will fowl the intakes but you just backdown and it comes off.

Anyways, my port engine is toast and is now only good worth a few thousand in salvage parts. Anyone have any advice on an economical way to replace? I don't want to drop 13k on a new one.
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thataway



Joined: 02 Nov 2003
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PostPosted: Mon Nov 18, 2019 9:25 pm    Post subject: Reply with quote

Is it a counter rotating engine?

Look for a used engine. Probably more likely to find one in places rather than Calif. A rebuilt--be be careful, there are some unscrupulous rebuilders.

A new or rebuilt power head--keeping your lower unit.

Occasionally a fisherman may decide to repower, and go with a larger engine.

There are 2 Honda 150's for sale on E-bay currently.

Search Craig's list.

Find a "Scratch and dent" new motor--I got one for several thousand off--had a bent skeg and scratches/ cracks in the cowl . it had been on a new boat, and in delivery the engine had been backed into an obstruction, with cosmetic damage.

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Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
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hardee



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PostPosted: Mon Nov 18, 2019 10:22 pm    Post subject: Reply with quote

Conrad. Sorry to hear of your predicament. Not a mechanic here so take the others advice.

Harvey
SleepyC Moon

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cmetzenberg



Joined: 04 Jan 2014
Posts: 367
City/Region: Santa Barbara
State or Province: CA
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: Kanaloa
Photos: Kanaloa
PostPosted: Mon Nov 18, 2019 11:41 pm    Post subject: Reply with quote

thataway wrote:
Is it a counter rotating engine?

Look for a used engine. Probably more likely to find one in places rather than Calif. A rebuilt--be be careful, there are some unscrupulous rebuilders.

A new or rebuilt power head--keeping your lower unit.

Occasionally a fisherman may decide to repower, and go with a larger engine.

There are 2 Honda 150's for sale on E-bay currently.

Search Craig's list.

Find a "Scratch and dent" new motor--I got one for several thousand off--had a bent skeg and scratches/ cracks in the cowl . it had been on a new boat, and in delivery the engine had been backed into an obstruction, with cosmetic damage.


Hi Bob,
I'm leaning towards getting a used engine and putting my lower unit on it to keep rotation. That's all I have to do right?

I'm really confused how the engine got this way. The mechanic says it was significantly overheated over long periods of time.
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TyBoo



Joined: 23 Oct 2003
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City/Region: Warrenton
State or Province: OR
C-Dory Year: 1996
C-Dory Model: 25 Cruise Ship
Vessel Name: TyBoo
Photos: TyBoo
PostPosted: Tue Nov 19, 2019 12:07 am    Post subject: Reply with quote

I would be interested in learning how frequent overheat can put water in the crankcase. If it was hot enough to warp the head you would not have needed an overheat alarm to know it. And why would it only do it to the brand new oil and not the previous oil if it was a long term condition?

I am not doubting your mechanic, but genuinely interested in knowing. I learn stuff on here all the time and am always appreciative when I do.

Best of luck with the replacement.

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Sold: 1996 25' Cruise Ship
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