Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-05-2017, 09:57 PM   #1
Guru
 
Alaskan Sea-Duction's Avatar
 
City: Inside Passage Summer/Columbia River Winter
Country: USA
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 4,811
1988 Onan 8KW maintanence

So my genny is 29 years old. Last summer while in the San Juans, I had an end cap go bad on the oil cooler. I fixed it, but was not confidant it would last the summer. Well it lasted the summer in salt water. I did discover things are different in salt water. Things corrode faster.

Fast forward to yesterday. I have anti-freeze in the genny pan. Vacuumed it out. Noticed a fast drip from the oil cooler. After commandeering the Admiral's beauty mirror and using the zoom side I discovered a small crack on the bottom. So what to do.

I called my local Cummins dealer, I was very surprised at the prices. i.e exhaust manifold/heat exchanger at NW Cummins was $1235! The part number had also changed.

In my research, I found Jacks Small Engine. The same manifold was $936. So $2100 later I have ordered the two heat exchangers ands associated hoses and gaskets. It will take a few weeks to get the parts, but I saved some $$$.

I rely on my genny as I am an electric boat. So after all this is done and it is all working I will be ready for next summer's cruise up the inside passage.
__________________
Advertisement

Alaskan Sea-Duction is offline   Reply With Quote
Old 01-05-2017, 10:05 PM   #2
Member
 
City: Portland,or
Country: USA
Join Date: Nov 2015
Posts: 7
That old would put a new one in then pice by pice..a new 8-10 k gen runs about 7500$$ here in calif. Just a note to you? Then putting $$ in parts when it goes and your some where you can get parts? They what do you do. Or gen was 35 years old and we put new on in, boy did do it just in time.....good luck...
__________________

Franky is offline   Reply With Quote
Old 01-05-2017, 10:15 PM   #3
Guru
 
Alaskan Sea-Duction's Avatar
 
City: Inside Passage Summer/Columbia River Winter
Country: USA
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 4,811
Quote:
Originally Posted by Franky View Post
That old would put a new one in then pice by pice..a new 8-10 k gen runs about 7500$$ here in calif. Just a note to you? Then putting $$ in parts when it goes and your some where you can get parts? They what do you do. Or gen was 35 years old and we put new on in, boy did do it just in time.....good luck...
True but the old one is still running good. $7500 huh. Plus install, another what $ 5,000?
Alaskan Sea-Duction is offline   Reply With Quote
Old 01-05-2017, 10:45 PM   #4
Member
 
City: Portland,or
Country: USA
Join Date: Nov 2015
Posts: 7
No we put our own in. Took 3 days but well worth it, just saying... call the company we got our from and they said to ask what type of boat? Location in the boat? The new ones are way smaller now also. So if you want can get you good price on one? Really not hard to put in...
Franky is offline   Reply With Quote
Old 01-05-2017, 10:46 PM   #5
Member
 
City: Portland,or
Country: USA
Join Date: Nov 2015
Posts: 7
Or pull old one rebuild it? Cheaper also?
Franky is offline   Reply With Quote
Old 01-05-2017, 11:02 PM   #6
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,355
Onan 8kW MDKD does not have an oil cooler.... ???

Do you mean the coolant heat exchanger? I think those are made by SenDure, check with them.
Ski in NC is offline   Reply With Quote
Old 01-06-2017, 01:00 AM   #7
Guru
 
Lepke's Avatar
 
City: Between Oregon and Alaska
Country: US
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 1,606
While you're waiting for parts, there's a bearing in the generator (opposite end from the engine) that should be changed every 5 years. Even on low hours, the lube sealed in the bearing goes bad.
Lepke is offline   Reply With Quote
Old 01-06-2017, 10:45 AM   #8
Guru
 
Crusty Chief's Avatar
 
City: Las Vegas/West Coast
Country: USA
Vessel Name: Pairadice
Vessel Model: Selene 47
Join Date: Jul 2014
Posts: 1,531
Waiting for parts, hmmmmm, what to do now.......maybe a Scotch and Cigar!
Crusty Chief is offline   Reply With Quote
Old 01-06-2017, 11:32 AM   #9
Guru
 
Alaskan Sea-Duction's Avatar
 
City: Inside Passage Summer/Columbia River Winter
Country: USA
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 4,811
Quote:
Originally Posted by Ski in NC View Post
Onan 8kW MDKD does not have an oil cooler.... ???

Do you mean the coolant heat exchanger? I think those are made by SenDure, check with them.
It is the heat exchanger which is round and has end caps on it. The other is actually called exhaust manifold, but also works as a heat exchanger and anti-freeze tank.
Alaskan Sea-Duction is offline   Reply With Quote
Old 01-06-2017, 11:33 AM   #10
Guru
 
Alaskan Sea-Duction's Avatar
 
City: Inside Passage Summer/Columbia River Winter
Country: USA
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 4,811
Quote:
Originally Posted by Crusty Chief View Post
Waiting for parts, hmmmmm, what to do now.......maybe a Scotch and Cigar!
You got it buddy!!!! You know me well.......
Alaskan Sea-Duction is offline   Reply With Quote
Old 01-06-2017, 05:16 PM   #11
Senior Member
 
Ex Sailor's Avatar
 
City: Toronto
Country: Canada
Join Date: Nov 2015
Posts: 271
1988 Onan 8 KW Fuel Solenoid

On the subject of an 88 8 KW Onan,
Now and then ... and after I stop our 1988 8KW Onan, it refuses to start.
I have to manually flip the fuel solenoid then it fires right up. The thing will work fine for several cycles of use and then again it's the same problem.

Is the solenoid going bad ? or is there other issue ?

Thanks in advance ... FB
Ex Sailor is offline   Reply With Quote
Old 01-06-2017, 06:21 PM   #12
Guru
 
BruceK's Avatar
 
Join Date: Oct 2011
Posts: 9,979
Quote:
Originally Posted by Ex Sailor View Post
Now and then ... and after I stop our 1988 8KW Onan, it refuses to start.
I have to manually flip the fuel solenoid then it fires right up. The thing will work fine for several cycles of use and then again it's the same problem.

Is the solenoid going bad ? or is there other issue ?
Very likely the solenoid. Had exactly the same problem. There are 2 "hold" magnets, the initial one which is failing you, and the after it starts one which keeps the plunger across. Check the connections are good.
You probably need a new one unless you fancy visiting the ER every time you want the genset run.
Available from Cummins/Onan, or get the part number and check on Ebay, you may save a bundle, both my OEM replacement and the spare I carry are made in China, the spare was $60 against the $300 OEM.
__________________
BruceK
Island Gypsy 36 Europa "Doriana"
Sydney Australia
BruceK is offline   Reply With Quote
Old 01-06-2017, 07:11 PM   #13
Senior Member
 
Ex Sailor's Avatar
 
City: Toronto
Country: Canada
Join Date: Nov 2015
Posts: 271
Quote:
Originally Posted by BruceK View Post
Very likely the solenoid. Had exactly the same problem. There are 2 "hold" magnets, the initial one which is failing you, and the after it starts one which keeps the plunger across. Check the connections are good.
You probably need a new one unless you fancy visiting the ER every time you want the genset run.
Available from Cummins/Onan, or get the part number and check on Ebay, you may save a bundle, both my OEM replacement and the spare I carry are made in China, the spare was $60 against the $300 OEM.

Thanks so much... appreciate the info, will get on it as soon as we launch in the spring ... FB
Ex Sailor is offline   Reply With Quote
Old 01-08-2017, 10:39 PM   #14
Guru
 
Alaskan Sea-Duction's Avatar
 
City: Inside Passage Summer/Columbia River Winter
Country: USA
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 4,811
Quote:
Originally Posted by Ex Sailor View Post
On the subject of an 88 8 KW Onan,
Now and then ... and after I stop our 1988 8KW Onan, it refuses to start.
I have to manually flip the fuel solenoid then it fires right up. The thing will work fine for several cycles of use and then again it's the same problem.

Is the solenoid going bad ? or is there other issue ?

Thanks in advance ... FB
Hey FB. I had the same exact issue. NW Cummins wanted $310. Jack's small engine was $220. 15 minutes to change.
Alaskan Sea-Duction is offline   Reply With Quote
Old 01-08-2017, 11:16 PM   #15
Guru
 
koliver's Avatar
 
City: Saltspring Island
Country: BC, canada
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 3,156
Quote:
Originally Posted by Alaskan Sea-Duction View Post
So my genny is 29 years old. Last summer while in the San Juans, I had an end cap go bad on the oil cooler. I fixed it, but was not confidant it would last the summer. Well it lasted the summer in salt water. I did discover things are different in salt water. Things corrode faster.

Fast forward to yesterday. I have anti-freeze in the genny pan. Vacuumed it out. Noticed a fast drip from the oil cooler. After commandeering the Admiral's beauty mirror and using the zoom side I discovered a small crack on the bottom. So what to do.

I called my local Cummins dealer, I was very surprised at the prices. i.e exhaust manifold/heat exchanger at NW Cummins was $1235! The part number had also changed.

In my research, I found Jacks Small Engine. The same manifold was $936. So $2100 later I have ordered the two heat exchangers ands associated hoses and gaskets. It will take a few weeks to get the parts, but I saved some $$$.

I rely on my genny as I am an electric boat. So after all this is done and it is all working I will be ready for next summer's cruise up the inside passage.
You are so lucky that you found the problem before it got worse. I had a 4 kw Onan, at about that age it blew through the end cap and dribbled salt water. Unfortunately, the sound shield was not designed to shed dribbled water, so running the generator resulted in that dribble of salt water being forced into the windings of the generator. You know the rest. I now have a Westerbeke with a sound shield that has no floor.
__________________

__________________
Keith
koliver is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 08:56 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×