[Gregory]

On mine the j1939 barely gave me any info.  I returned them and got the j1708 version and recived much better data.  2007 qsmll dry 660

[Gregory]

What was the result of the oil in the coolant.  Head or oil cooler?

Greg

 

[Gregory]

Not what I expected but I was right.  Now I know why no vibration on a bad prop. 

port 36 pitch starboard 34 pitch.  

Wow

 

[Gregory]

Steve ,

Thanks for the info.   Bought the boat.  Did the sea trial and took burn data.  The port is loaded more, burns more fuel across the rpm range.  Considerably more in the upper range compared to the starboard side.  5 gal per hour.   My  personal feeling are there is a bad prop on the boat. They had a mechanic check things out and determine all is fine.  During sea trial  I felt some vibration in the lazaret but could not determine the side. I also saw a note in the survey “the props are only out of balance a-little based on the straight stick test”. What does that mean?  I always run class 1 props.  My understanding is if you can see, or hand measure a difference the prop is WAY out of spec..  So with all things equal the only thing that loads an engine is the prop and “props move boats”  ; I’m betting on this being a bad prop.

 I’m currently having all oils changed, fuel filters changed, water impellers changed. Ill do full seawater side this spring  once I get to my home port. I am having the props removed and sending to a prop scan shop.  Hopefully the starboard prop is close to stamped because that engine is burring less and is burning 22.5    , at 1800 18.5 .   

If I am correct , I want to pick up 200 rpm.   trans twin disk 2.53 -1, props stamped 34×38 4 blades. Semi displacement hull. I Shure the prop shop will be a resource , but I like being and informed consumer.

With the deep reduction how much pitch can I drop?  How much rpm will I pick up per inch of pitch change?

What is better less pitch larger wheel or  smaller wheel ( remove diameter) and keep pitch the same?

Greg

[Gregory]

Tony 

I don’t see anything on the site about the conversion manifold.  Any update.? been a while 

<br />Greg

 

[Gregory]

Yes it was.  There is a oil passage in that corner,  The old style gasket ( I was told) the rubber compression seal failed, maybe got hard. It was the source of the leak. 

[Gregory]

Ok it wound up being a head gasket. Looking at the back of the engine on the left corner,  The small oil passage has a compression ring.  Old style gasket.  that’s were it failed.  Flipped out the head 5k hrs. all good to go.  1 year on the repair.  A lot of work for an oil leak.  LOL

 

Greg

[Gregory]

How do we post phots of high resolution when max file size for attachments is 5mb.
Greg

[Author]

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