2000 150hp fitcht ram sucking air?

[rsbbpayne]

I HAVE A 2000 22 FOOT LOWE DECK WITH 2000 FITCHT RAM 150 HP.I NOTICE THAT THE RPMS WILL RAISE AND LOWER WHILE IN NEUTRAL,AND WILL ONLY TURN 4100 RPMS AT WOT,HAS A 19 PITCH PROP.WHICH IS WHAT I SEEN ON ANOTHER RIG SAME AS MINE,WHAT IS THE CORRECT WAY TO CHECK THE FUEL BULB AND HOSE? I AM GETTING SUPPLIES TO DE-CARB.HER,COULD CARBON BUILD UP CAUSE IT NOT TO TURN THE RPMS IT SHOULD AT WOT? COMPRESSION CHECKS WITH-IN 10 PSI MAX.BETWEEN EACH CYLINDERS. THANKS IN ADVANCE TO A GREAT BUNCH OF GUYS...

 

[Cricket Too]

Re: 2000 150hp fitcht ram sucking air?

rsb.....Did the WOT used to be higher? And when you say the rpm goes higher and lower in neutral, how drastic is it? Is it slight, like only 50 rpm or drastic, like a couple hundred rpm? Also you really don't need a fuel primer bulb on that motor, because it's injected. I have the exact same motor and never had a primer on it and it always starts fine. If your compression is still pretty good, I doubt that decarbing will give you any higher rpm's, but it can't hurt especially if it's been a while. If when you make sure it is running right, you can't get that WOT to at least 5600 you might need to reprop. Good luck.

 

[seahorse5]

Re: 2000 150hp fitcht ram sucking air?

You may have a leaking diaphram in the fuel pump causing the rpm changes. That motor should be propped to run close to 5500 rpm with an average load, which may mean a 15" or so on that 22 footer of yours.<br /><br />Have a QUALIFIED tech check out the motor comepletely to make sure there is not detonation damage or other problems.

 

[rsbbpayne]

Re: 2000 150hp fitcht ram sucking air?

THANKS FOR THE QUICK RESPONSE.MMCPECK,I DONT KNOW IF THE RPMS WERE HIGHER JUST BOUGHT IT,THE RPMS WILL CHANGE A COUPLE OF HUNDRED RPMS,IT CAME WITH A PRIMER BULB ON IT SHOULD I REMOVE IT? WHAT IS YOUR COMPRESSION READING?MINE IS AROUND 120PSI.PER CYL.,I THOUGHT DECARBING WOULD BE A GOOD IDEAL SINCE I DONT KNOW IF IT EVERY HAS BEEN DONE!WHAT ARE THE SYMPTOMS OF A CARBED UP ENGINE?<br />SEAHORSE,COULD YOU EXPLAIN DETONATION?HOW CAN I TROUBLESHOOT A LEAKING FUEL PUMP DIAPHRAM.<br />THANKS FOR ANY ADVISE..

 

[Cricket Too]

Re: 2000 150hp fitcht ram sucking air?

rsb....I'm not really sure how to check the fuel pump diaphram in this engine, as the fuel pump is alot more complicated than the regular ones. I doubt the fuel primer bulb is your problem and it's fine to leave it where it is, just when the valve inside it eventually goes bad don't worry about replacing it. My compression is about the same as yours, a little higher around 125. <br /><br />I'm sorry I can't be that much help to you as I have never had a single problem with my Ficht, which I recently sold. I have never had to do anything besides PM. It may be easier to decarb your motor by using a fuel additive, I usually put it in the tank and also take the airbox off, take the fuel filter/water separator off, dump the fuel out of it and put a mixture of fuel and decarb, heavy on the decarb, back into it and run that through the motor until it really starts to smoke, if you want you can spray some down the air plenum also. This is the same way I used to fog it for the winter. I hate to say it, really hate to say it, but you may want to take this problem to a Ficht tech to get fixed, as these motor are alot more complicated than the standard carbed 2 stroke, and harder to diagnose unless you have been trained on them and know how to test certain things. This is the only thing that ever made me nervous about owning it, was that I wouldn't be able to diagnose and fix the thing myself, thought about getting the software once but realized without someone to show me how to interpret the data, I would be wasting time and money. When they run good they are the best thing on the water. Let me know what happens, I'm curious and always want to learn more about the Ficht. Good luck.

 

[seahorse5]

Re: 2000 150hp fitcht ram sucking air?

You may need the services of a trained FICHT tech or an understanding of the service manual.<br /><br />The fuel pump uses two pulse lines from different cylinders in the crankcase. If a diaphragm has a pinhole, it can leak fuel into a cylinder and cause an rpm change. Remove each pulse line from the pump and check for any signs of gasoline. Then squeeze the primer bulb super hard and hold pressure on it for about a minute. Look for any leaking fuel coming out of the pulse line fittings.<br /><br />Detonation is "exploding" inside the combustion chamber instead of the steady burn. It's the pinging that you hear in your car with cheap gas or under a heavy load. You can't hear it in your outboard, but it damages the pistons, etc. You have to have a compression test and inspect the tops of the pistons. It can be caused by overpropping the motor (in your case), lean mixtures, advanced timing, or poor quality fuel.

 

[rsbbpayne]

Re: 2000 150hp fitcht ram sucking air?

Thanks again you guys for the info.I will do more checking.still waiting on some plugs,when they come in I will change them out along with fuel filter and then retest,for some reason this weekend took it to the lake and the rpm(raising up and down) problem seemed to go away....? but after decarbing still only ran 4100 at wot.Just thought of something, I never have checked it to see if its getting full throttle..

 

[Cricket Too]

Re: 2000 150hp fitcht ram sucking air?

rsb...Make sure that you index those plugs, even though the 2000 has pinned heads you still need to index the plugs, you can find out how to do it by doing a search on this site. What do you mean by checking to see if it is getting full throttle? When you push your throttle you are opening the butterflies in the air plenum but a sensor(similar to a TPS in a car) is moving and telling the computer how much fuel to add. This is one of those things that you will need a tech to check out for you, not much you can do about it. Good luck.

 

[jdekonink]

Re: 2000 150hp fitcht ram sucking air?

Hello,<br /><br />I have the same problem regarding my 175 Ficht ram (2000). In neutral the engine rpm raising up and down. Have you already been able to resolve your problem?<br /><br />My problem could be linked to a frequent check engine sign (codes 41 and 42). Only when the red light burns the engine goes up and down. I am about to replace the water temp sensor (codes 41 and 42 suggest its broken).<br /><br />Hope to hear from you.