Reply
 
Thread Tools Search this Thread
 
Old 18 January 2016, 06:40   #1
Member
 
Country: UK - Wales
Town: Bangor, North Wales
Make: Tornado
Length: 5m +
Engine: Evinrude 70hp OB
Join Date: Nov 2001
Posts: 93
Ultrasonic cleaners - Evinrude 70

I'm still struggling with the Evinrude 70 (old, late '70s?). It idles fine and will go for a bit, but then the revs drop off as fuel starvation sets in. It is possible to make it go by pumping the primer bulb furiously - we are talking serious effort here. I have bypassed most of the fuel system and fitted an electric pump with no change. I think there must be a blockage in the carbs. Looking online, they may be prone to it. Carb kits do not normally fix it, but new carbs do it seems. Anyway, I have resolved to do as detailed and complete clean of the carbs as I can ... and so now to the question

How good are ultrasonic cleaners? I am fairly convinced that they will leave the carbs looking like new, but will they clean out blockages? At the moment I plan to attack with a carb cleaner spray, an airbrush cleaner kit (lots of mini bottle brushes and widgets for cleaning tubes) and some patience.

Advice welcome!

I could buy three new carbs for 300 - pretty steep for such an old engine, but...?

Many thanks

David
__________________

__________________
dpround is offline   Reply With Quote
Old 18 January 2016, 07:01   #2
Member
 
steco1958's Avatar
 
Country: UK - England
Town: West Bromwich
Boat name: Ellie V
Make: Excel Voyager 520
Length: 5m +
Engine: Evinrude 75 HP
MMSI: 235 908 287
Join Date: May 2012
Posts: 680
300, compared to ?????

I would buy the kit !!
__________________

__________________
steco1958 is offline   Reply With Quote
Old 18 January 2016, 07:20   #3
Member
 
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Mercury
Length: 3m +
Engine: Suzuki Outboard/25/4
MMSI: 235074042
Join Date: Oct 2011
Posts: 3,570
ultrasonic cleaners are very good if you use the correct cleaning fluid we use them to clean our diving hats you can get a carboreter cleaner for 120.00 but if you have 300.00 you know their good to go if brand new.

cheers
__________________
jeffstevens763@g is offline   Reply With Quote
Old 18 January 2016, 07:32   #4
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,582
RIBase
I have a Walkers ultrasonic bath. I got one of the "cosmetically damaged" ones. Had it over 10 years now & it's saved me a fortune in diving gear servicing. As Jeff says, you need the correct fluid for the job. All that said, I'd probably go for the new carbs. Try Mike Vincent at South Coast Marine in Christchurch. What he doesn't have isn't worth having.

http://www.walkerelectronics.co.uk/p...sonicbaths.php
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5
Pikey Dave is offline   Reply With Quote
Old 18 January 2016, 08:06   #5
Member
 
Country: USA
Town: S. Carolina
Boat name: D560
Make: Avon
Length: 5m +
Engine: 2016 Merc 115hp CT
Join Date: Aug 2013
Posts: 1,119
I use a mixture of household cleaning vinegar and 99% isopropyl alcohol when cleaning carbs in my ultrasonic.

The alcohol degreases and dissolves most varnishes, the vinegar will destroy most corrosion.
__________________
Richard
Gluing geek since 2007
office888 is offline   Reply With Quote
Old 18 January 2016, 09:48   #6
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,582
RIBase
For diving gear I used a teaspoon of citric acid powder & a dash of washing up liquid.
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5
Pikey Dave is offline   Reply With Quote
Old 18 January 2016, 11:43   #7
Member
 
Country: UK - Wales
Town: Bangor, North Wales
Make: Tornado
Length: 5m +
Engine: Evinrude 70hp OB
Join Date: Nov 2001
Posts: 93
Thank you for the advice. I think my summary is that an ultrasonic bath might do the job, but it is not as cheap as I thought, which makes the new carbs possibly the better bet as they are a pretty sure fix. I think I'll have one last go manually cleaning them and then give up and spend the money.

All the best

David
__________________
dpround is offline   Reply With Quote
Old 18 January 2016, 12:25   #8
Member
 
Country: USA
Town: S. Carolina
Boat name: D560
Make: Avon
Length: 5m +
Engine: 2016 Merc 115hp CT
Join Date: Aug 2013
Posts: 1,119
Quote:
Originally Posted by dpround View Post
Thank you for the advice. I think my summary is that an ultrasonic bath might do the job, but it is not as cheap as I thought, which makes the new carbs possibly the better bet as they are a pretty sure fix. I think I'll have one last go manually cleaning them and then give up and spend the money.

All the best

David
It's a misadjusted float is what it sounds like.

All you need to do is pull the floatbowls off, remove the floats, and test them all to make sure they float properly. If they do, the tabs all need to be set to the proper height.
__________________
Richard
Gluing geek since 2007
office888 is offline   Reply With Quote
Old 18 January 2016, 14:48   #9
Member
 
Country: UK - England
Town: bicester
Length: no boat
Engine: outboard only
Join Date: Feb 2009
Posts: 894
before I retired, I used a sonic cleaner with a special soap, to clean carburetors , it made a bloody good job of it as well. The one I used was set at, 60 degrees centigrade and the timer was set for twenty minutes.Team tip don't leave them in the solution overnight as it lets the carbs grow whiskers, Blow through all the fuel channels as soon as you remove the carbs from the sonic cleaner.
__________________
uncle al is offline   Reply With Quote
Old 25 January 2016, 07:09   #10
Member
 
Country: UK - Wales
Town: Bangor, North Wales
Make: Tornado
Length: 5m +
Engine: Evinrude 70hp OB
Join Date: Nov 2001
Posts: 93
Finally fixed it! Tried cleaning the carbs again. Guitar strings and carb cleaner spray seemed to be pretty good, but not convinced of any blockage. Tested the carbs on the electric fuel pump with the float chamber drain plug out. One filled, two did not. So I stripped and cleaned them again, and again. Finally I figured out that the previous owner had assembled two of the carbs with the floats upside down and so the float valve could not open when the carb was assembled!

If I were doing it again I would start with taking the carb drain plugs out and pumping the primer bulb to see if any fuel comes out! I think this would be a useful test with many multi-carb engines.

Anyway - thank you for all your help and advice!

David
__________________

__________________
dpround is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 22:55.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.