Force 50 NO Acceleration Under Load

[gerrysr]

Re: Force 50 NO Acceleration Under Load

I am a real novice since I have little, real experience with any outboard except a Johnson 40 HP 1989.<br /><br />If the engine has needle valves for the high and intermediate speeds could they be misadjusted? (Assumes the low speed needle valve is adjusted properly or if it is an orfice that it is the correct Part No. and properly seated.)<br /><br />If it has Orfices are they correctly seated? Could they be switched? (Assumes the orfices have different metering properties.)<br /><br />Is the choke open all the way at WOT?<br /><br />As I said I'm a novice so take the above with that in mind. It may not even be applicable to your engine.<br /><br />Gerry Smith

 

[JB]

Re: Force 50 NO Acceleration Under Load

Well, Only, I am suspicious of the wrench(s) who said there is nothing wrong.<br /><br />I wish I knew more about your engine. If you brought it to me I would start from scratch with the engine in the tank and with a test wheel on it.<br /><br />I do believe that someone overlooked something and wrote it off as okay when it isn't. Like the carb, for example.<br /><br />Let us know what happens.

 

[Squeakit]

Re: Force 50 NO Acceleration Under Load

Take the carb apart (with manual of course) and make sure someone didn't leave out the spring that holds the high speed jet in place - high speed jet could be loose which would flood the motor with fuel at WOT. Make sure your float level is correct and your float needle valve is seating properly. Something is letting too much gas in - it's not very complicated. My Force 50 is missing the high speed jet spring - I don't know what holds it in place, but if I start having problems similar to yours, I'll know right where to look. Make sure you have the manual that shows your carb before you dismantle it. Also check to see if the little float spring that helps keep the float up is in the proper place. They are tricky to install, and someone could have put it in wrong. Good Luck!!!!

 

[Sucker for punishment]

Re: Force 50 NO Acceleration Under Load

Hi, I too am blessed with a Force 50 and had the same problem. What I finally determined on my own after two marinas looked at it was the CD unit below the two coil packs had one bad wire coming out of the heat shrink goop that seals it from behind. What was happening was the coils were getting a poor control signal from the CD unit and this was causing a missfire on both cylinders. When this occurred, it felt like it was only running on one cylinder and the boat would only move very slowly in the water. If you check the wiring for the coils and the CD unit, you might find a weak spot. My motor only has about 15 hrs on it but yet the wiring was bad.<br />Just a guess, but let us know what you find. I can't afford 6 or 7000.00 dollars for a new motor so I guess I have to hope that the Force will be with me for a while............ <br />Take care and good luck.

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

These are all great ideas. I will try to tackle each one these suggestions this weekend. I will definetely post my results. Thanks.

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

By the way, what is the CD unit? Where is it located? Also if you kno where the coil packs would be located it would help me as well. One more thing...what are reeds? Thanks for the help.

 

[ewaltb]

Re: Force 50 NO Acceleration Under Load

onlygm - <br />I think the carb responses are right on. I have a 120 Force that had/has a carb issue with the needle valve getting stuck. When the float closes to shut off the gas, the needle doesn't decend to do the same thing. It doesn't shut off the gas, and basically floods my engine.<br />Do the crab covers (Lack of a better term) get full of gas after you run the engine? Is there an unusual potent gas smell from your engine?<br />A carb rebuild is fairly cheap and might be worth it either way if they have never been done before.

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

I hate to sound like a First mate but what are crab covers? Can you also give me a 2 word explanation of what reeds are?

 

[ewaltb]

Re: Force 50 NO Acceleration Under Load

Well on mine there is 1 (2 carbs) black cover that mounts to the front of each carb. There is a little collection tray that is supposed to catch any discharge from the carbs. <br />When my carbs went these were full, plus gas everywhere else below the carbs. That is why I asked if these had gas in them and if there was an abundant amount of gas in the engine. (I mean Forces leak gas no matter when things are working well or not)<br />The reeds, and someone correct me if I am wrong, are directly behind the carbs, in front of the crank case, which direct the and portion the flow of mixed gas and air to the appropriate cylinder.

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

I would like to know if anybody here has a connection for Force parts and that can get a price on a used carb for me. The specs are below. <br /><br />Manufacturer - Walbro<br /><br />Nunbers on Flange - WE17C10/88 <br /> 684-061

 

[JB]

Re: Force 50 NO Acceleration Under Load

It would be a lot cheaper, and smarter, to buy a manual and overhaul the carb yourself.

 

[ewaltb]

Re: Force 50 NO Acceleration Under Load

[www.dougrussell.com]<br /><br />Onlgm - JB is a smart man. Don't replace a part that is not bad. It just needs a few new parts and some tuning. This site has the rebuild kits plus the new one if you decide that is the way you want to go.

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

The problem is, I am not sure what component of the carb is malfunctioning. It wont hurt if i tinker around with it. I will get the manual and see what i can do first, but i was just securing a new one incase it comes down to me needing it. I will post my findings Later on this weekend. Thanks Alot!

 

[ewaltb]

Re: Force 50 NO Acceleration Under Load

Onlygm - How did it go this weekend?

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

I replaced all wires going from the CD to the coils, replaced all plugs, same problem.<br /><br />Took the carb completely apart and cleaned out all components. Rebuilt it and was still experiencing the same issue. I tried to find a thinner fuel line but was unable to. I tried pinching the fuel line while it was running and RPM's increased but then engine died. Its definetely a problem with running too rich. Everything else is working fine. What should i check on the carb to make sure that too much fuel is not getting let in. The float needle looks ok, the float is brand new. Im bout ready to use this thing as a paper weight.

 

[dmessy]

Re: Force 50 NO Acceleration Under Load

Heres something to check...If your electric choke is stuck in the open position allowing alot of raw fuel to enter your cylinders this would cause the excess you've experienced.<br />Just a thought...<br />Force...been there,done that,got a tee shirt!

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

Hi guys,<br /><br />We just took a deeper look at the engine and cant seem to figure this one out. Once again to go over everything, The motor runs great while in the driverway without any load. Throtlle up is excellent and while in gear, we throttle up and get high RPM's (5000). Checked all electrical wiring, no loose connections, carb seemed to be working fine, no excess gas spitting out, there was however gas on the plugs. As soon as load is put on, low RPM's and low MPH. Stumped..... Anybody have any ideas? Electric Choke is working fine, compression is good, spark to both cyl, timing is good, not even sure anymore if the problem is being too rich. HELP!<br />

 

[Timwelder]

Re: Force 50 NO Acceleration Under Load

I hate to sound like a first mate. But I am, I know u said it's a new float but have u taken it off an shaken it? New parts can be messed up too. I too have a 50hp force.

 

[JB]

Re: Force 50 NO Acceleration Under Load

Onlygm.<br /><br />Your engine is not running great with no load. It only seems that way. Any multicylinder 2 stroke can seem to be running great on one cylinder when there is no load.<br /><br />So. 1. Forget the idea that it idles or revs great with no load. It means nothing.<br /><br />When under load, at least one cylinder is not making power, maybe both are down on power.<br /><br />You said that you have a new float. How did you set the float height? Did you use the Manual?<br /><br />Disconnect one spark plug. Start and run the engine under load on the other cylinder. Then disconnect the other spark plug. Do the same. <br /><br />Is there any difference?<br /><br />Let us know.

 

[onlygm]

Re: Force 50 NO Acceleration Under Load

I misworded my thoughts. The boat sounds like it is running good while there is no load <br /><br />We did howevcer try pulling the plugs one by one and there was NO change in rpm. I dont think thats a good thing but would like to here your thoughts.<br /><br />Thanks!