New member with first 47' commander with Detroit 8v53.   I took it out this weekend and parked in a cove so kids could swim around.   when throttled down from 11 knots the alarm went off on the starboard engine.  So I jumped down and shut it off.   Tried to crank it a few minutes later and the alarm stayed on.   I let it sit for an hour or so check the oil and all was fine.   Hung out for a few hours and then fired both back up and drove fine back to the marina.   When docking at marina once pulled back on throttles for wake zone alarm went off for a second and then quit.   Pressure on gauges is fine.   I am thinking the sensor is bad as it only seems to do it when drop from throttle to idle.  Don't have much experience with this particular diesel but is what makes sense to me. 

Views: 89

Reply to This

Replies to This Discussion

Had the same exact problem and replaced the oil pressure sender. Not sure what the root cause of the problem was (stuck sender?).

perfect I assumed that was the issue but figured the wealth of experience on here would verify. 

My 47 did this the first few times I took it out. After the 3rd time we had it out - we never had that issue again. It had been sitting without use for a while so perhaps that had something to do with it.

I wondered about that she has been sitting for two years except one run to the yard for bottom repaint.  So many things don't work but motors run and she drives 

I had the same problem on my 8-71s shortly after I purchased my 451 Commander. I replaced the senders, problem solved!

Matt,

There are oil pressure senders that go to the oil pressure gauges.

There are also low oil pressure switches that will trigger the alarm. They come in various pressures.5,10,20,and 27psi.

I personally prefer the 10psi on the Detroits as the 5psi is pretty low and not much warning that something is going wrong.

The Detroits are also notorious for having low oil pressure at idle when hot so your alarm going off might be a nuisance alarm or the switch might be getting weak.

Here is what you likely need:https://dieselpro.com/detroit-diesel-parts/8v53-engine2/solenoids-s...

Replace the senders with the 5 psi version. This was always a problem on Detroit’s even when they were brand new, if you come off plane straight to idle they’ll ring the alarm bells temporarily on the 10psi ones until the oil cools down. I switched to 5psi for this reason. They never ring now. Which is fine for a 500 rpm idle. Rule of thumb is at least 1psi per 100rpm. The cause is the unique 2 cycle oil requirements you can only use straight weight so it gets thin when hot.

Reply to Discussion

RSS

Club News

Save The Date!!

Chris-Craft Commander Club National Rendezvous

When:  July 24-26, 2020

Where:  Algonac, Michigan

Click Here for the most current details

Registration Open Date: TBD

_________________________

SuperDisc 15.0 and Resource Collection 5.0 Available Now!

SuperDisc 15.0 is an electronic encyclopedia of every aspect of Commander maintenance and repairs. The information on the disk is retrieved from the discussion forum and e-mail list, but organized in a way that makes information easy to find and use. SuperDisc is available on USB flash drive

Click here for more details https://commanderclub.com/page/superdisk

The SuperDisc 15.0 Complete Edition is for first time buyers of SuperDiscs.

The SuperDisc 15.0 Upgrade Edition is intended for those who wish to upgrade their SuperDisc 1.0 through 14.0. Each year we add over 1,000 posts. Don’t miss out.

Resource Collection 5.0 is great to own too!!!

The Resource Collection 5.0 contents include CC Catalogs and Brochures. CC Service Bulletins, CC Price Lists. Engine & Transmission Manuals. Dick Avery sketches and drawings, a folder for every Commander model, and all kinds of technical and interesting stuff. Over 193 folders and 2,697 Files. A true “Treasure Trove” for the Commander owner!

We thank you for supporting the club with your purchase of SuperDisc15.0 and/or Resource Collection 5.0. We hope you find it to be the value we feel it is, and trust you will enjoy the other benefits your payment will help provide. It’s your payment that helps to support the activities of this dues free organization that has grown from 12 members in 1999 to well over 4400 members in 2020.

To order now click here!

________________________

Fall Edition of Styled In Fiberglass Available here!

The Fall 2019 Edition of the Chris-Craft Commander Club's newsletter, Styled In Fiberglass, is now available for your reading pleasure.  Click here to download this and past issues.

_________________________

2019 Annual Photo Contest Winners

Sixty-Eight photos were submitted for this year's contest.  They were absolutely amazing, making selecting a top 3 an extremely difficult task for your Executive Committee

Thank you to all that submitted a photo to the contest and even if your photo was not in the top 3, it could appear on a cover of Styled In Fiberglass, the club's newsletter due out in November, or the 2020 Wall Calendars, which are now available.

2019 Photo Contest Winners

Past Photo Contest Winners

2019 Photo Contest Entries

_________________________

     

© 2020   Created by CCCC Webmaster.   Powered by

Badges  |  Report an Issue  |  Terms of Service