89,85HP Force-Loss of Propulsion

[roadrunnr]

Re: 89,85HP Force-Loss of Propulsion

Tw:
After making or checking the throttle roller adjustment and you reconnect the throttle link, it is normal for the throttle roller not to align with the pickup cam. This comment is straight out of the link and sync proceedure in the Force factory manual. You maybe looking at a problem that doesn't exist.

 

[TWFisher]

Re: 89,85HP Force-Loss of Propulsion

We must have the same manual!

I guess what has me concerned is just before that where it says to adjust the cam to where it just touches roller. Im unable to make this adjustment. The only thing I didn't do is to try to adjust the roller. At a glance, it looks like the roller is adjusted all the way out, but it may be more ecentric than it looks. Im gona follow step by step tomorrow.

Also, with the adjustment I have now, when I push forward on the control, I can see the trigger, I think it's the trigger, under the fly wheel advancing, but since the cam is not yet touching the roller, no increase in throttle is taking place. Atleast not at first, once I get further into the control, the cam makes contact and begins operating the carbs.

Im also a little concerned with those wires not being hooked up. I had this thing at a mechanics. Im wondering why this was not caught. Unless there's anohther way to wire it. I don't know, it seems like they should be hooked up to me.

 

[john from md]

Re: 89,85HP Force-Loss of Propulsion

Your problem is basic geometry. The timing and carb rigging is off.

The rigging is not that complex if you do it step by step. Don't try to start in the middle no matter what you think you did right. Start from the bottom because everything is interrelated.

One area that I have found that folks get wrong is the cable end adjusment. If you search Frank A.s posts you will find a wealth of knowledge on this subject.

When you are finished, the line on the trottle cam should contact the roller when the throttle is in the idle/neutral position. It may be a little below center but it will be touching. When you move the throttle to fast idle/neutral, you will get a little movement in the carb linkage and a little movement of the timing tower.

John

 

[TWFisher]

Re: 89,85HP Force-Loss of Propulsion

Anyone have any idea about the wiring being disconnected. Is this a problem or are there alternate methods of wiring that the previous owner may have used?

 

[john from md]

Re: 89,85HP Force-Loss of Propulsion

Look at the wiring schematic in your book and make the engine look like the book. It appears someone was playing around with your wires in the past.

Since all the wires are color coded, and the manual shows where they go, it will be a relatively easy task to put them on the terminal block the way that they are supposed to be.

Regards,

John

 

[TWFisher]

Re: 89,85HP Force-Loss of Propulsion

Thanks, let me play around with the linkage and see if I can get it adusted properly. The reason I didn't want to start messing w/ the wiring is not sure why it is hooked up like it is. I don't want to fry this thing. I don't understand why it's running with this module disconnected.

I'll let you know what comes about.

Thanks again,

 

[TWFisher]

Re: 89,85HP Force-Loss of Propulsion

Folks, please excuse me for being so dense. I was going off the assumption that the mechanic I hired had plenty of experience. This is what he told me. My problem with the cam not making contact with the roller was a matter of adjusting the ecentric roller out to touch the cam. I know this is obvious but I steered away from this because the mechanic and I had conversations about this and he said this was not the problem. I tend to trust people who have 50 years of experience. His solution was to adjust the cam way past the roller until it did make contact, putting the timing way off! I havn't started the engine since I adjusted it but will probably tomorrow. I also found a new prop.

Hopefully this will solve my headache and I can do some fishing soon.

 

[roadrunnr]

Re: 89,85HP Force-Loss of Propulsion

TW:
Glad you found your problem. Sounds like he was adjusting the Throttle cam link, which is used to adjust the carb throttle plates to be "wide open at WOT. So, that adjustment might be off as well. Make sure you go through the entire link and sync adjustments step by step. Who knows what else may have been adjusted incorrectly.

 

[TWFisher]

Re: 89,85HP Force-Loss of Propulsion

Yep, I belive thats good advice Mr. Roadrunnr! I've been going through this procedure and it seems easy enough to do. Let you know how it turns out.

Thanks,

 

[TWFisher]

Re: 89,85HP Force-Loss of Propulsion

I took the boat out for a test run. The engine starts like a champ and eruuns good except two things occoured that have me concerned.

1. Through the lower range of throttle, all is good, decent power, but when in the higher range, full throttle, I suddenly loose propulsion. It returns again in lower range of throttle. This problem is intermiten, some times I can run at full throttle with no issues. Im getting two replies to this: One, the prop is spun and needs to be replaced; Two that the prop is fine, if it had spun it would not return in the lower range of throttle. Not sure which way to go. What else could it be or is it likely the prop.

2. I seem to be missing a range of throttle. When pushing the control forward, the boat accelerates to a point, and as I continue to push the throttle forward, no change, then all the sudden the bow jumps up and it takes off. On one occasion, I pushed the throttle forward, with no change in accel, took my hand off the control, about 1.5~2 seconds later the engine responded, the bow came up and... My mechanic seems to think it has something to do with the S cam.

Well, I think we can put this one to bed!!!

I sync and linked the carbs and got a new prop, as suggested. Took her for a run yesterday and much, much better performance!!! I now have low speed operation and I have hole shot!

So, the cause of problem 1. was a spun prop. The reason for 2. was poor carb link and sync. Since adjusting, I now have a full range of throttle where as before I was missing the lower range.

I had a very good trip out yesterday!

Thanks very much for all the help,

TW