| Author |
Message |
    
joe baras
New member
Username: gotwohull
Post Number: 1
Registered: 06-2008
| | Posted on Friday, June 20, 2008 - 10:11 am: | 
|
The engine stalls in low idle when it warms up.No 2 and 4 cylinders do not fire in idle and it only starts if I am in 1/2 to 3/4 idle. When I put it in gear it stalls when I put her back to neutral. It also boggs down above 1/3 in foward. Can this be gummed up carbs? Thanks for any help Joe |
Graham Lamb
Senior Member
Username: galamb
Post Number: 3430
Registered: 05-2007
| | Posted on Friday, June 20, 2008 - 10:52 am: |
|
Sounds like a possibly a couple of issues.
If you have no spark on a pair of cylinders, you have a problem in your ignition components.
That may also be the cause of it's difficulty starting/poor idle or you could ALSO have a problem in the fuel system, including gummed carbs.
If this motor has not been maintained, at minimum, to the schedule in the owners manual it needs some serious maintenance and troubleshooting right away or it may be one step away from the junk heap.
When was the plugs/oil/filters etc last changed.
Have the valves ever been adjusted?
When was the impeller/gear oil last done?
4 strokes can not be neglected the way 2 strokes can... |
joe baras
New member
Username: gotwohull
Post Number: 2
Registered: 06-2008
| | Posted on Friday, June 20, 2008 - 11:16 am: |
|
Thank you Mr. lamb. I know you hate 4 strokes for the novice. I tend to agree with you. The four stroke came with the boat. Thank you for your expert advice. The plugs,oil, fuel filter, oil filter,water pump all changed. A wire to the voltage regulator red
plug seems broken. Can I bypass the plug and splice it? What kind of rep does this motor have? I also noted most of the parts for this motor are a lot higher than most 60hp outboards. Again Thank you for your expert help. Joe |
Graham Lamb
Senior Member
Username: galamb
Post Number: 3435
Registered: 05-2007
| | Posted on Friday, June 20, 2008 - 11:25 am: |
|
You can splice the line with a piece of automotive wire of similar gauge. I would cover it with a bit of heat shrink to make sure it's water tight.
It's difficult to give a real opinion on the 4 strokes. They are just getting to the point where all the problems/quirks are becoming apparent. Seems like the minute the 5 year extended warranty ends they are ready for the scrap heap.
I suspect part of it is the dealers fault for not overly impressing on the people purchasing these that NO you can not treat them like an old 2 stroke. They are fragile. And while I'm sure they are making them more durable as the technology advances, I still believe that the dealers are doing people a grave dis-service by only hilighting the postives about them.
In general the 40/50/60 horse 4 stroke Merc (same motor with a couple minor differences)appears to be a decent engine. The new ones at least are all Merc (or so they say) and are quite popular.
I would own one, but would definately do maintenace at double what is recommended by the book. I just don't trust them enough yet... |
joe baras
New member
Username: gotwohull
Post Number: 3
Registered: 06-2008
| | Posted on Friday, June 20, 2008 - 02:29 pm: |
|
Again Thank you Mr. lamb Can gummed up carbs make 2 Cylinders not fire? Thanks joe |
Graham Lamb
Senior Member
Username: galamb
Post Number: 3444
Registered: 05-2007
| | Posted on Friday, June 20, 2008 - 05:03 pm: |
|
That depends what you mean by not fire....
Can it prevent the spark plug from sparking? NO
Can it cause a lack of combustion in a cylinder? Yes it can. Additionally, if gas/oil is not making it to that cylinder (or a bank of cylinders sharing a carb) while the other side is working fine, you can destroy those cylinders.
No gas means NO OIL which equals JUNK ENGINE before very long... |
joe baras
Member
Username: gotwohull
Post Number: 4
Registered: 06-2008
| | Posted on Friday, June 20, 2008 - 05:32 pm: |
|
I tested the spark pugs in the pull off each one to see how it effects the engine method. So I mean no combustion in the cylinder. So I should clean the carbs first? Then fix the ignition problem. And run the engine as little as possible while its not running properly. Again thanks for your help |
Benjamin Jones
Member
Username: benjamin_jones
Post Number: 39
Registered: 04-2008
| | Posted on Saturday, June 21, 2008 - 04:15 am: |
|
Hi there!
Just noticed a comment by Graham:
No gas means NO OIL which equals JUNK ENGINE before very long...
Considering that this motor is a four stroke, how would no fuel affect the lube system? I'm going on the assumption that four stroke boat motors run on similar principles to those found in motor cars.
It's interesting to hear that fuel starvation in four strokes could fry the powerhead. In motor cars, fuel starvation is resultant of an empty wallet and ultimately equates to pushing...
Or am I missing something with this technology?}
Regards from a wintery Johannesburg in South Africa!
Benjamin. |
Graham Lamb
Senior Member
Username: galamb
Post Number: 3453
Registered: 05-2007
| | Posted on Saturday, June 21, 2008 - 09:20 am: |
|
Sorry - two stroke on the brain  |
joe baras
Member
Username: gotwohull
Post Number: 5
Registered: 06-2008
| | Posted on Saturday, June 21, 2008 - 01:30 pm: |
|
Thank you Mr. lamb And Mr. Jones |
