DW-15 will not get on plane?

Bob Collier

Active member
Sorry guys but I am baffled?
My season ended a little early last year do to a rock punching a hole in my hull in November.
Boat went into the garage, and I noticed during the off season the lower unit was leaking so changed out the seal and refilled the gear case and patched the hole in the hull ( thanks to a lot of help and advice from the great members on DuckBoats.net! )
Took it out today and it will not plane out!! Nothing changed as far as the set up.
40 hp Evinrude tiller, Panther trim/tilt unit on a Duck Wrangler 15' fiberglass hull.
Motor seems to be running smooth, tried adjusting the motor under power with no change. It is not cavitating just will not plane out at WOT, worked fine when I closed out the season?
Any thoughts?
Thanks in advance
Bob
 
Is prop bent out of shape from hard use? If that motor is at the lower range of h.p. rateing for hull prop being just a little out of shape could keep boat from planeing out easy. Was there foam flotation iun hull that water may have infiltrated when you punched hole in boat. Maybe if it didn't dry out thoroughly you,ve picked up a good deal of extra weight. If motor is turning proper r.p.m,s and running good I,m more to believe its bent prop though.
 
Prop looks good, no dings or obvious flaws in the blade, I looked at the prop shaft when I had the prop pulled to change the seals no obvious issues.
I cut out a window in the floor of the boat and put a fan on it for about two weeks, I am confident the foam was dry when I did the repair.
Very strange as it planed out fine the last day I used it last season, which was the day I holed the hull. The damage was in the bow and we had to travel about three miles after, again planed out for the trip back to the ramp, today would not plane out.
 
Sometimes a motor will sound good but not hitting on all cylinders. Try hooking a timing light up to each plug wire to make sure you don't have a dead cylinder. Also make sure your trm is really moving all the way. Good luck.
 
Last time I heard of a problem like this was with a brand new boat that the buyer returned to the dealer. Dealer sent him to a local pond and told him he would meet him there. Upon arriving at the launch the dealer quickly suggested he take the boat off the trailer instead of taking the trailer off the truck.

So the question is ......[;)]
 
I will double check the trailer thing but I don't think that was the problem😉

I checked the spark on both cylinders and it seemed to spark well.

After doing some more thinking, I found it was very hard to steer and I raised the motor up to the last hole to raise it, I am not sure this would cause it to not plane out? It ran fine at full throttle and wasn't cavitating. It also didn't over rev at WOT which, from my understanding, could be a sign of a spun hub.
Thanks for all the suggestions, keep 'em coming!!
 
my thought would be bad hub in the prop or one cylinder isn't firing. I had a 1990's 40 hp VRO type evenrude on a Boston whaler i had put it in the water and it wouldn't plane turned out i had a bad power pack. That thing seemed to run great on one cylinder.
 
If you raise the motor too high it will most likely not plane out. What pin do you normally run it on?
 
Carl said:
If you raise the motor too high it will most likely not plane out. What pin do you normally run it on?

I actually raised the motor up on the bracket for the T&T unit, the cav plate was slightly below the bottom of the boat prior to raising it. It now sits just above the bottom of the boat. My experience in the past has been if mounted too high the motor will cavitate once on plane or at WOT this time it will simply not plane out the boat. As far as the pin I run the bottom hole on the bracket.
 
Bob- I meant to add that the symptoms of a spun prop would be that it would run normally under slow speeds, but as soon as you throttle up, the prop hub would begin to spin. If you continued to run spinning the prop, it would get worse pretty quickly.

Miller
 
I marked the hub and the prop and took it out. The boat will throttle up in neutral and then when I put it into forward gear it will not fully rev up and the boat won't plane still. I pull the prop when I got home and I the marks are still line up, so it doesn't seem to have been a spun hub. It will also throttle up to full in reverse, I about swamped backing up too fast :)
 
Phil Nowack said:
What about a plugged jet or varnished carb?

Hope not, Carberators are not in my wheelhouse. I will check the compression, spark plugs and gas filter
If nothing else works I will have to breakdown and take her to a mechanic
 
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