Attempted to take the boat out again this weekend (Last weekend, motor didn't start). Got the motor going and purred like a kitten. I was very happy, I put in reverse to get away from the dock and all went well. This is where the problem occured and I'm hoping someone can help me out on this. When I went into forward gear, everything is fine until I try to give it some more throttle to get more speed. The throttle handle at 15 degrees to about 60-70 degree nothing happens. When I pass this 60-70 degree, I get into a quick trolling speed, that's all.
1978 SSV-176 Glastron with a 1976 115 hp model 1150 , 1972 Mercury115 hp
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Your friend,your partner, your defender,your dog.You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion....by E.F. Henry
I am NOT a mechanic, but I did stay at a Holiday Inn Express
No not necessarily. I don't have a tach but by listening, for the speed that it's going, it is right. I would assume, like a car, if it revved up you'd be able to tell it's not right. So, I'd have to say it was fine with the speed it was going.
Have you checked for spark on all cylinder and a compression check of all cylinders?
__________________ Rest in Peace Spinner
1978 SSV-176 Glastron with a 1976 115 hp model 1150 , 1972 Mercury115 hp
------------------------------------------------
Your friend,your partner, your defender,your dog.You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion....by E.F. Henry
I am NOT a mechanic, but I did stay at a Holiday Inn Express
If it were the spark, would I hear a difference in the motor, like misfiring or something odd? To me, as I said initially, it's purring like a kitten. I was very surprised actually. I will check the plugs tomorrow and also the compression while I'm at it. Is there a certain number I should be looking for on the gauge or should I look for concistency between the cylinders?
I can't answer your first question, but for compression,
over 100 and within 10% -15% of each other.
__________________ Rest in Peace Spinner
1978 SSV-176 Glastron with a 1976 115 hp model 1150 , 1972 Mercury115 hp
------------------------------------------------
Your friend,your partner, your defender,your dog.You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion....by E.F. Henry
I am NOT a mechanic, but I did stay at a Holiday Inn Express
Checked the compression and all is good. They were all at 120. I'm taking the step further and I've taken out the carbs to clean them out. The boat had been sitting there for almost two years. I'm also going to clean out the gas lines. I've noticed that the fuel filter has some debris and also the same in the carb when I took them out today.
I'm sure it may be one cause of something. I'm still stumped with the throttle not giving me any thrust. Anyone with ideas?
What year and serial # is your motor?
1) When you get the carbs clean take it out and try it.
2) Try adjusting the motor tilt up or down a setting or two.
3) could be too much pitch on the prop.
4) could be the high speed winding an the stator.
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"Many of the greatest sailors were pukers."--Thorfinn Skullsplitter
Smig, what happened to you was the no throttle issue? Did you have to adjust the throttle cable at all. As I said earlier in the posts was that the throttle arm at around 11 to 12 o'clock pushing forward to between 10 o'clock there is play in the throttle. Then just pass 10 o'clock the arms onthe motor begin to move but before that there's nothing. Only the sound that the motor is going into gear. By rebuilding the carbs (if this was your issue) fixed the problem??
assumming you have an inline 850, after rebuilding the carbs, do a linc and sinc, it is in the engine faq forum, by ClamsCasino. this put the electrical timing in sinc with the carb timing, so the work properly together,
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That's great!! Thanks to everyone for their help. Maybe I do have one more chance to take the boat out for a spin before it gets too chilly up here in the north. I'll keep you all posted.
...what Tashasdaddy said. All of this stuff is related. After cleaning the carbs, I did a link and sync (which does include cable adjustment, but not until AFTER everything else is set correctly)
I'm too new to give you advice, but I will tell you what I did to get mine going. First I bought two manuals - an old OEM and a newer Clymer - didn't use either of their timing methods, but the pictures helped alot! I also had to do it in a logical order because there is so much going on (I am new to motors and still learning what to listen/watch for) This is the order I did it in - others can correct me, but I basically followed the fuel supply.
1) Made sure I had clean, good gas (with good oil and a good cleaner - I used sea foam)
2) Replaced the fuel bulb
3) Cleaned the fuel pump screen.
4) Cleaned the carbs (tore them apart - spray in the throats & jet wasn't good enough)
5a) Link and Sync (per Clams in the FAQ section - you can do most of it in your driveway)
5b) Finished link and sync at the water (you will know what I mean when you read it) I set the carbs a bit rich and the idle a bit high for the first test run.
6) For the next 2 or 3 outtings, I fiddled with the carb settings, the idle settings and the throttle cable preload, until I found the right combination that works for us (lots of trolling, in and out of gear, no-wake zones, starts and stops with the occasional WOT addrenal rush in between)
7) Still to do: I need to get the idle/pre-load dialed in after doing a decarb (it idles much better now), and rebuild the fuel pump, but I may wait until next season for those. I will also recheck the link & sync, because I will probably learn something new over the winter that I want to change!
So you know, these old mercontrollers are strange - at least both of mine are. The first 20 degress or so of handle movement, from 12:00 - 11:00 o'clock, only shifts from neutral to forward (800-600 rpm), then from the first timing event (11:00 - 9:30 o'clock on the handle, 600-3000 rpm, spark being advanced) is trolling speed stuff and then at the second timing event (9:30 - 8:00 o'clock, 3000-5500 rpm, max spark advance and the carbs really open up) the handle gets really, really stiff - I almost have to lean on it. All of the searches I did came back with the (very unsatisfying answer) that this is just the way they are. Next season I may mess with the cables, but first things first - get your motor running correctly so that it doesn't get burned by wrong timing or lean carbs!
I hope that helps, I know it's long winded and if I made a mistake - please, someone correct me!!!
Thanks Shaun,
Everything you've mentioned, I either received an answer on this GREAT forum, also from my own "extensive" research on (dare I say it) other forums and also in the Seloc Manual. But you did mention a little more than others so every little bit counts and extremely helps.
One more little question, all of this can be done by one person or would it be easier with two? I'm thinking to crank the motor I'd have to remove the throttle and relocate it to the back of the boat so that I can turn the key and watch I need to watch...
"extensive" research on (dare I say it) other forums
It is true - I have had to take some of my research elsewhere :'( until they get the search here fixed!! I hope it is soon!!
Quote:
all of this can be done by one person or would it be easier with two?
For me it took two - one to crank and then I did the adjustments. I actually needed both hands, one for the timing light and one to move the spark advance lever. On the water for carb and throttle cable adjustments, I still used two people, but mostly for safety - I wanted to have someone that could kill the engine if something went wrong, especially when checking the idle in gear.
BTW: What year motor do you have? All of my comments are based upon my '76 with the CDI ignition - I don't have a distributor.
This shows the s/n and years for USA and Canadian motors. I was having trouble even with our local Mercury dealers trying to find the year. They all said that they couldn't find my serial number. The previous owners of the boat didn't have documentation but they did say it was a 1976.
As per my Seloc manual the specs of the '76 & '77 are, so far, similar.
Here's an update, I've taken the carbs apart, cleaned them, new gaskets and I'm ready to link and sync the carbs. The new question is that I have a 2 lead (a red and a black) tach tester. Where do I hook this up? The instructions show how to hook it up for vehicles but I can't see where I would hook it up on an outboard. Any ideas would really help?
I don't think a car tach will work - they are for 4-strokes whereas you have a 2-stroke so it wouldn't be right and then there is the number of poles and this is where I get confused.???
I ended up buying a marine tach and setting the poles per the instructions. If you don't have one in the boat - get one. You will need it for timing the engine, propping it and monitoring it. RPM's tell you far more about your engine than speed. If I could only have one gauge it would be the tach...the only thing I can tell from my speedo is if there are weeds stuck on the pitot. d
Mercury 850 - no power/speed
Linear Mode
