Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: Help with alarm

Help with alarm 10 Sep 2016 17:32 #1

  • Raymond14
  • Raymond14's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 111
  • Thank you received: 3
Today on the port engine the "starting alarm " ( the one that goes off for a few seconds when you start the engines ) has been coming on and staying on. Temp. showed in the normal range. It had come on for a few seconds a couple of times ( random ) about a month ago, but went away all by it's self. Changed impellers on both engines in June ( removed impeller pieces }. Looking for any info or a point in the right direction. Our dear friend and marine mechanic recently passed , so we are kind of at a loss. Any help appreciated.

Please Log in or Create an account to join the conversation.

Raymond 14
1997 3388ES
twin merc 350 inboards

Help with alarm 10 Sep 2016 18:08 #2

  • Ruffryder
  • Ruffryder's Avatar
  • Offline
  • Moderator
  • Moderator
  • Posts: 7639
  • Thank you received: 1418
Twin Mercruiser Blue water engine in your 3388...the Oil Pressure Switch is not opening up sounds like.
Disconnect TAN / BLU wire on the OPS see if it goes away.
The following user(s) said Thank You: Raymond14

Please Log in or Create an account to join the conversation.

Joon, Kathy, Jaden & Tristan
93 3058
92 2855
91 Fourwinns 205
Longbranch WA
Life is Good

Help with alarm 11 Sep 2016 14:18 #3

  • Raymond14
  • Raymond14's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 111
  • Thank you received: 3
Thank you Ruffryder. Gave this info to my son. He advised he following. First, he has no idea where the Oil Pressure Switch would be located . Second, the oil level in the engine is normal. Third, the oil pressure gauge for the port engine shows 0. When the alarm first started, it would come on an go off, During this time the engine temp, was normal. His conclusions. If the oil pump would have failed, surely the temp would have risen and the engine would have overheated, or blown up. He believes that it is in fact the oil pressure switch , but since he does not know where to look . Any ideas on where a site where there would be a photo of the OPS in it's position on the engine. Again, any help is greatly appreciated.

Please Log in or Create an account to join the conversation.

Raymond 14
1997 3388ES
twin merc 350 inboards

Help with alarm 11 Sep 2016 14:31 #4

  • Sportscar
  • Sportscar's Avatar
  • Away
  • New Member
  • New Member
  • Posts: 52
  • Thank you received: 8
A little Goggle searching comes up with these choices depending on your manufacturers choice of location

Right behind and a little right of the distributor, or right above the oil filter.

Please Log in or Create an account to join the conversation.

Last Edit: by Sportscar.

Help with alarm 11 Sep 2016 15:15 #5

  • Ruffryder
  • Ruffryder's Avatar
  • Offline
  • Moderator
  • Moderator
  • Posts: 7639
  • Thank you received: 1418
yup on the port side, above the original oil filter ....ensure it has a TAN / BLU wire on it,
The following user(s) said Thank You: Raymond14

Please Log in or Create an account to join the conversation.

Joon, Kathy, Jaden & Tristan
93 3058
92 2855
91 Fourwinns 205
Longbranch WA
Life is Good

Help with alarm 25 Sep 2016 14:13 #6

  • Raymond14
  • Raymond14's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 111
  • Thank you received: 3
Just a response and thank you again, for all who helped. Found the switch in question, located behind the dist. ran an oli pressure check to make sure . All good, ordering a new switch Monday. Thanks again.

Please Log in or Create an account to join the conversation.

Raymond 14
1997 3388ES
twin merc 350 inboards

Help with alarm 25 Sep 2016 14:14 #7

  • Ruffryder
  • Ruffryder's Avatar
  • Offline
  • Moderator
  • Moderator
  • Posts: 7639
  • Thank you received: 1418
:cheer:

Please Log in or Create an account to join the conversation.

Joon, Kathy, Jaden & Tristan
93 3058
92 2855
91 Fourwinns 205
Longbranch WA
Life is Good

Help with alarm 25 Sep 2016 19:04 #8

  • Gsherwood
  • Gsherwood's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 224
  • Thank you received: 14
That's why I like this site! :P

Please Log in or Create an account to join the conversation.

Glen Sherwood
1987 3270
Coupeville, WA

Help with alarm 24 Jul 2017 20:57 #9

  • Raymond14
  • Raymond14's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 111
  • Thank you received: 3
Just a FYI and another help , if you can post. Ordered the Oil pressure switch, son's friend who is an auto mechanic and electronics wiz, ran tests on the existing unit. Said it was working. Reconnected and everything was fine. Went on 40 mile cruse, all OK, then all of a sudden, brief buzzing, bell like alarm again. Intermittent soundings, does not stay on. Have ran another manual oil pressure test on engines, OK. Oil pressure goes from normal ( about 40 ) down to almost nothing, tap gauge sometimes it quits, but as soon as alarm goes off, needle goes back to where it was. As of yesterday, my son advised both engines are sounding, again intermittent . Engines only have about 400 hours on them. Seems like it must be a short or ground issue. Other than the alarm, boat runs fine. As usual, any help is greatly appreciated.

Please Log in or Create an account to join the conversation.

Raymond 14
1997 3388ES
twin merc 350 inboards

Help with alarm 25 Jul 2017 02:33 #10

  • Uncle Bob
  • Uncle Bob's Avatar
  • Away
  • Platinum Member
  • Platinum Member
  • Posts: 1720
  • Thank you received: 132
There's a harness on top of the engine. Many wires go to connectors there. Unplug use dielectric and re-plug.
The following user(s) said Thank You: Raymond14

Please Log in or Create an account to join the conversation.

1989 26' then 1994 32' now 2001 39'

Help with alarm 25 Jul 2017 18:13 #11

  • Ruffryder
  • Ruffryder's Avatar
  • Offline
  • Moderator
  • Moderator
  • Posts: 7639
  • Thank you received: 1418
Ray, so existing OPS on it now, or you replaced it with a new OPS switch?
alarm circuit simply comes ON by completing the 12VDC (-) negative, ground loop TAN/BRN wire.
disconnect the alarm wire at the OPS, see if you can simulate this problem again...

Please Log in or Create an account to join the conversation.

Joon, Kathy, Jaden & Tristan
93 3058
92 2855
91 Fourwinns 205
Longbranch WA
Life is Good

Help with alarm 25 Jul 2017 21:35 #12

  • Raymond14
  • Raymond14's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 111
  • Thank you received: 3
Thanks. It is the org. switch . Will give it a shot.

Please Log in or Create an account to join the conversation.

Raymond 14
1997 3388ES
twin merc 350 inboards

Help with alarm 25 Jul 2017 21:52 #13

  • Ruffryder
  • Ruffryder's Avatar
  • Offline
  • Moderator
  • Moderator
  • Posts: 7639
  • Thank you received: 1418
why not put the new switch in? if you still have it...

Please Log in or Create an account to join the conversation.

Joon, Kathy, Jaden & Tristan
93 3058
92 2855
91 Fourwinns 205
Longbranch WA
Life is Good

Help with alarm 26 Jul 2017 11:24 #14

  • MacPhid
  • MacPhid's Avatar
  • Offline
  • Premium Member
  • Premium Member
  • Posts: 368
  • Thank you received: 63
The concern I would have is the statement " Oil pressure goes from normal ( about 40 ) down to almost nothing, tap gauge sometimes it quits, but as soon as alarm goes off, needle goes back to where it was."
The low oil pressure alarm switch and the oil pressure sender for the guage are two separate devices on two separate circuits, yet they both seem to be telling the same story. It would be unusual for both senders to be defective. You may have a low oil pressure condition and the senders are giving accurate information. You mentioned that the original OPS was tested and determined to be working. I would tee a manual oil pressure guage into the system to verify if a low pressure scenario exists.

James

Please Log in or Create an account to join the conversation.

1989 Bayliner 3888, 175 Hinos,
Hurth 630's Onan 8kw MDKD
Lowrance Electronics!
MMSI
316030379
Boating on Georgian Bay
  • Page:
  • 1
Moderators: higgins_jrJim Gandee
Time to create page: 0.132 seconds
Powered by Kunena Forum