1989 70HP EVINRUDE WILL NOT "WOT" PULSE LIMITER QUESTION.

[gsCAT96]

I AM WORKING ON A WOT PROBLEM. ENGINE IDLES FINE, AND WILL REV IN NUTURAL. BUT WILL NOT REV WITH A LOAD. Gets 2000rpm AT BEST. HAVE CHANGES FILTERS INLINE AND IN ENGINE UNDER VRO. NEW TANK, NEW FUEL.<br />I AM HAVING CARBS REBUILT AND WAS ASKED ABOUT THE "PULSE LIMITER" THREADED TO THE MAIFOLD. DOES THIS HAVE MOVINING PARTS INSIDE? CAN THIS CAUSE MY KIND OF PROBLEMS? SOULD I REPLACE IT?<br />ANY HELP WOULD BE GREAT.<br />THANKS<br />MODEL E70TLESB

 

[Steve135]

Re: 1989 70HP EVINRUDE WILL NOT "WOT" PULSE LIMITER QUESTION.

gsCAT96 Hi Please don't type in all caps its hard on the eyes to read post all night like that. There are many post for 70 hp with this same problem use the search feature to help you locate the answers.<br />steve

 

[gsCAT96]

Re: 1989 70HP EVINRUDE WILL NOT "WOT" PULSE LIMITER QUESTION.

Steve,<br />I have found nothing in the seach reguarding the workings of the "pulse limiter".<br />Is this a part that can cause the problem I described in my post.<br />Thanks

 

[Steve135]

Re: 1989 70HP EVINRUDE WILL NOT "WOT" PULSE LIMITER QUESTION.

gsCAT96 I would try searching 70 hp, 70hp, bogging down, no power ect <br />The limmiter is normally for a overheat condition. I belive there is a tan wire around the head for this. If you disconnect it and the problem goes away this could be your problem.But theres also a Tan wire that for the temp sensor! There will be others to jump in and give you good advice! I am thinking more on the lines of <br />carbs/synchronization These motors (70hp) are noted for bad idle and power loss from minnor adjustments. Hang in there!<br />steve

 

[seahorse5]

Re: 1989 70HP EVINRUDE WILL NOT "WOT" PULSE LIMITER QUESTION.

The pulse limiter protects the fuel pump assembly, VRO, from damage caused by backfires. If it carbons up, it can restrict the pumping action making the motor sound like it has a bad fuel pump.<br /><br />If you squeeze the primer ball while the motor is "bogging", it will increase in power if the pump or limiter is bad. Chances are you have a different problem such as compression, carbs, or ignition.