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Author Topic: Verado 150 pencil coils  (Read 243 times)
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Location: South TX
Posts: 1

« on: June 14, 2019, 01:39:35 pm »

Just passing along my experience.  Several years ago my Verado 150 with about 250 hrs would not get top rpm but ran fine below about 4500 rpm.  After playing with the fuel system to no avail (float switch mod was incorporated) it still behaved the same.  After much searching for info I bit the bullet and changed all the pencil coils and that fixed the problem.  Recently (with about 350 hrs on the motor) it started doing the same thing.  Again, I changed the coils and took the boat out.  At first, it bogged down again which disappointed me greatly but didn't stop my fishing.  After fishing, and in smoother waters, I opened it up and it ran great.  Got top rpm, no bogging.  Perhaps the previous bad coil plug was fouled a bit due to not firing and after running awhile cleaned up its act?  The new coils are Titans - $37 on Amazon but I see Ritco - $35 on Ebay and Delphi - $22 on Amazon (discovered these after buying the Titans). 

Shortly after the above discussion, the problem came back, ie., runs great up to about 4100 rpm and will get to around 5000 if throttle is advanced very gradually but bogs down if advanced farther or if advanced quickly (as pulling up a skier).  I checked and gapped the plugs, had the fuel injectors cleaned (about $25 a pop).  In line fuel filter and water separating filter (under cowling) replaced.  Fuel is fairly fresh.  I gave up trying to fix it myself and took to a mech.  He seems very knowledgeable and will check it out.  I should know in a week what the problem is.  I will post the results.  However, in discussions with the mech, he suggested I install a water separating filter in the fuel line before the motor.  I seem to have read or heard that this is unnecessary in Verados with the red top, castellated water separating filter under the cowling on starboard side.  If I remember, I even heard or read that installing another filter could restrict fuel flow and be detrimental to engine operation.  My mech strongly advises me to put one in.  Any thoughts?  Thanks
« Last Edit: August 04, 2019, 05:13:21 pm by jgib » Logged
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Posts: 79

« Reply #1 on: June 17, 2019, 12:06:08 pm »

Any part numbers for each brand?
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Location: Seattle
Posts: 7

« Reply #2 on: June 18, 2019, 07:03:47 pm »

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