Engine Identification and timing degree

[mrcombel1963]

Seeekin Engine timing degrees and Id of my 140 HP <br />Evinrude, Tag says J140TLCNB, I figured the "C" is for Canada and know its 140 hp but dont know the date for a parts repair manual, I want to get a carb kit for it and would like to ajust the timing since it has been relocated to a new hull, we always took care by replacing everything that broke on it, "WOT" wide open throttle is as it has great idle in or out of water, but as soon as it has pressure while in gear it bogs out and stalls, starts great and idles great, throttles high in idle, has new plugs, new water seperator, new tank, new fuel and oil, new lines and a new attitude but remains a problem, last year we had the water pump redone and the water is still cool, we recently had the carbs flushed and defunked, the power was higher but the bog still keeps the boat at the dock. I would like to repair to use out fishing with this newer hull, any suggestion most appreciated. <br />Sincerely Stacks

 

[OBJ]

Re: Engine Identification and timing degree

Hi ya' Stacks...welcome to iboats!<br /><br />Your 140 was originally tagged as a Johnson with tilt n' trim, long shaft and the year is 1982. Not made in Canada.<br /><br />Relocating the engine to a new hull will not change the WOT timing on the engine. If the rpms are not up to specs, likely it's a prop or setup issue or both.<br /><br />The only way to really clean a carb is to remove it from the engine, soak it, blow it out and install a new carb kit. Flushing a carb, however you do it, really doesn't work.<br /><br />The bogging problem can be caused by either an ignition problem such as loss of spark on a cylinder, fouled carbs or the sync and link can be outta' whack....like maybe the throttle plates arent' opening/closeing all the way or are not in sync. Have you taken a compression test on the cylinders lately?

 

[mrcombel1963]

Re: Engine Identification and timing degree

10-4 on removing the carbs and blowing it out, this was our case and the throttle assembly including the exact plate origannly connected to prior boat was removed and installed with new hull exact same everything was used and no extra parts were available when finished, the boat was the only extra part (exceptions being new parts of fuel system) ie, Fuel Lines. Water Seperator, Fuel Tank, Plugs, New Fuel and Oil. instaling new parts in a carb was not done only soaking cleaning and removing old varnish, Prop size, diameter is not otta sync since boat dimention are the same and same prior equipment is used, spark on plugs is present on all plugs, power pack are working correctly, compression is pressent, test for pressure of correct lbs has not been performed, ignition in spark is very good no starting problems, my problems are when the engine goes from idle to motion, as motion begins bogging becomes present and then fludding out, restart and engine sounds fine, engage and loose power. any Idea's<br />Sincerely Stacks

 

[OBJ]

Re: Engine Identification and timing degree

If you can actually see fuel coming from the carbs throats, you still have a carb problem...the floats are not seating the inlet needle. Primer bulb firming up when squeezed?<br /><br />Have you checked the link and sync?

 

[mrcombel1963]

Re: Engine Identification and timing degree

Yes I can see down the throat as the fuel passes down into the deeps of the spark link and sync, no just kidding we are very thankfull for all your exspertise and are in this diagnostic mode now or was, taking her down the ramp in a few minutes to put some pressure on it to test it out, the control linkage was deffinetly off and out of adjustment, maybe jumped the gun but with the new floats - seats- jets and a proper a dyno adjustment we might see some improvement today. we will check you later to advise of our outcomes, <br />Sincerely Stacks

 

[mrcombel1963]

Re: Engine Identification and timing degree

Well that was a lesson in the dark waters of reality, the compression was 115 lbs on all four cylinders with excellent spark, we found out that we were running on the lower half of the four cylinders being a carburetor obstruction not allowing the foat to work correctly in the upper carburetor (a peace of gasket material) we'll were bolting her back up and with a little luck we'll get her back in gear munyanna !!!<br />Hope yur getting yur challenges. <br />Sincerely Stacks