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re: UPDATE: Outboard won’t fire…need some tips
Posted on 3/15/22 at 10:27 pm to tigereye58
Posted on 3/15/22 at 10:27 pm to tigereye58
Sitting that long need to send carbs to get cleans and check the reeds. Before I send carbs I would try and get it to turn over, check spark and test the coils, and if fuel hoses are old go ahead and replace with solid ethenol safe fuel lines and then put carbs back on and try and tune it up. Then if that didn't work I would send it in. But I like learning and then paying someone else to fix shite if I screw it up.
Check battery wires pos/neg
Check neutrel switch
Check spark gap
Check coils
Check fuel lines
Send carbs in
Inspect reeds
Reassemble and try and tune it up.
Check battery wires pos/neg
Check neutrel switch
Check spark gap
Check coils
Check fuel lines
Send carbs in
Inspect reeds
Reassemble and try and tune it up.
1
Posted on 3/16/22 at 5:53 am to tigereye58
Sounds like a bad coil.
Posted on 3/16/22 at 8:28 am to tigereye58
It's a bad idea to spray starter fluid into a 2 stroke motor over and over. "If it ain't smoking its bout to be broken"
Posted on 3/16/22 at 8:34 am to Park duck
quote:
It's a bad idea to spray starter fluid into a 2 stroke motor over and over. "If it ain't smoking its bout to be broken"
I agree totally... was the only way I could get the old piece of junk to start though.
Posted on 3/16/22 at 10:09 am to Lsutigerturner
In reference to your initial issue (batteries): I would bring them to an auto parts place to have them load tested. If they check good but just need charging,that's simple. But I would also get a small wire brush and thoroughly clean the posts and the connectors. I can tell you over the years I have had this issue several times and a quick cleaning solved the immediate problem. I have since been spraying every electrical connection with Corrosion X; I highly recommend this product to all boat owners. on the not firing, I concur that I would verify I am getting spark (use starter fluid)first. If the motor at least coughs, you are getting spark. Beyond that you need to keep diagnosing till you pinpoint the issue. Most of the time it is related to an air leak on fuel delivery or carbs need to be cleaned/rebuilt.
Posted on 3/16/22 at 10:43 am to tigereye58
Take off the battery cables and hit them with some emory cloth to get them nice and shiny.
Take off the air breather (on the front of the motor) and make sure its not clogged.
Its something simple..... i have a 90 Yamaha, bullet proof engines.
Take off the air breather (on the front of the motor) and make sure its not clogged.
Its something simple..... i have a 90 Yamaha, bullet proof engines.
Posted on 3/16/22 at 10:55 am to omegaman66
quote:
Power pack issue?
That was my first thought. Dad had an old Johnson 90 that had a problem with a pack with similar symptoms
Posted on 3/16/22 at 12:59 pm to elprez00
Friend of mine has a 90 yammy 2 stroke, if he chokes it to try to start it he'll flood it and he needs to grind the hell out of it to make it fire. If he leaves the throttle in neutral and turns the key it will fire. He learned this from another 90 yammy owner at the landing.
Posted on 3/16/22 at 8:36 pm to VernonPLSUfan
Bump. See the update in OP.
Posted on 3/16/22 at 8:50 pm to tigereye58
I highly doubt it can measure oil while off. Probably means nothing.
Posted on 3/16/22 at 9:11 pm to LEASTBAY
quote:
I highly doubt it can measure oil while off. Probably means nothing.
Unless that old Yamaha is a 2 stroke instead of a 4 stroke them it has a two stroke oil reservoir then it could shut down the ignition.
Posted on 3/16/22 at 9:26 pm to Swazla
I assumed it was 4 stroke. I guess you're right.
Posted on 3/16/22 at 10:08 pm to Swazla
I’m not sure the difference between 2 and 4 stroke but it does have a separate oil tank. One other thing I noticed is the air intake had a puddle of oil in the bottom of it. There’s also no air filter. Just an intake. Not sure why there’s oil in the air intake.
I did get it to actual crank a few times tonight and then die but I’m at least making progress.
I did get it to actual crank a few times tonight and then die but I’m at least making progress.
Posted on 3/17/22 at 9:19 am to tigereye58
quote:
I did get it to actual crank a few times tonight and then die but I’m at least making progress.
If this is the case, then it’s almost 100% a carb issue. I’m not familiar with your motor but if it has more than 1 carb, drain the bowls and blast them out real good with carb cleaner.
Then try to get it running on starter fluid and keep bumping it with the starter fluid and the vacuum may help suck the gunk out of the jets. Like others have said, if it’s, a 2 stroke, I wouldn’t do it for too long with just starter fluid. Maybe just 30 seconds at a time.
Posted on 3/17/22 at 9:32 am to tigereye58
Sounds like 2 stroke. Like above said, clean carb and see if it runs. Taking the carb out and cleaning/rebuilding is usually fairly simple.
Posted on 3/17/22 at 10:53 am to tigereye58
The oil residue at the intake is not an issue. Because the engine mixes the oil with the fuel, you are probably just seeing where the fuel/oil mixture has dripped and the fuel has evaporated. The oil does not evaporate. You could possible have an issue with the oil tank/sending unit. On the tank there is a part that goes into the tank that measures the oil level in the tank. There is a float that rides up and down to send the oil level to your instrument. That float is suspect to getting gunked up and sticks in either a FULL position (BAD), or in a LOW position, which could shut you down but at least you won't burn up the engine. You'll see wires going to the oil level sensor, pull it out and slide the float up/down. If there are any rough spots, you need to clean it up and reinstall. Also there is a sending unit (pump) that send the oil to be mixed with the fuel. That could be faulty also.
Posted on 3/17/22 at 10:57 am to skullraker
Worth mentioning: You said you weren't sure if the engine was 2 or 4 stroke. I believe it has been established it's 2 stroke (smoker). Having said this and your mention of "low oil" message; I wanted to be sure you realize that the oil tank needs to be filled in order for the engine to start/run. In short, are you sure the tank has enough oil in it?
Posted on 3/17/22 at 11:43 am to latech15
quote:
I was told that it is bad to run/start a two stroke on starter fluid b/c it has no lubricaton (oil) in it. I’ve done it a few times but just be wary. Could be just internet experts giving internet advice.
How will that be worse than just rotating it with the starter over and over again if it is not getting fuel?
And if it is direct oil injection, well, wouldn't the oil get there whatever fuel was firing it up?
That isn't something I would worry about.
Posted on 3/17/22 at 11:45 am to mdomingue
quote:
How will that be worse than just rotating it with the starter over and over again if it is not getting fuel?
Wayyyyyyyyyyy higher piston speed.
You don't have to worry about bearings so much since 2 strokes have roller bearings, but it will absolutely scuff the bore/piston if its just ran on ether.
Posted on 3/17/22 at 11:46 am to mdomingue
quote:
And if it is direct oil injection, well, wouldn't the oil get there whatever fuel was firing it up?
With a fancy one like an optimal or etech yes. Old school oil injection just sprayed oil into the carb IIRC.
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