my boat wont plane either

[DSL DOC]

first of all i have an older 62 14' V bottom crestliner with a '68 40 hp rudey, engine is running fine after going through it and some tweaks still need to adjust a tad to get a little more throttle but has enough to plane this little fiberglass thing first of all i noticed was boat was all over place hard to control till i figured out to much weight on one side moved everything seemed much better, what it does is gets up pretty good then about 3 secs later feels like someone put a snow plow on front and the rpms start screaming till i back off rpms almost sound like im runnin it in gear full throttle no load and i get sprayed from the plow i tried everything raising and lowering motor on transom and all the diff tilt locations any suggestions i think if i could get it to plane it would get right along pretty descent any help would be appreciated i tried searching but couldnt find anything in search on this topic is it true i need more weight up front since fuel battery and motor at rear this doesnt make since as i would think more in rear would help lift front also is there an adjustment for straightening the motor to go straight its ever so slightly off has manual cable steering thanks <br /><br />very frustrated to watch them big bass boats screaming by and all i want to do is get a nice clip goin

 

[DSL DOC]

Re: my boat wont plane either

ne suggestions pertaining to my situation

 

[Bart Sr.]

Re: my boat wont plane either

DSL DOC---I'm just thinking about some other posts I've seen here and have two questions.<br /><br />Is the boat new to you?<br /><br />Do you(or anyone else) think tho prop pitch may be the culprit?<br /><br />It sounds like you have eliminated just about everything else.Hopefully someone more knowledgable will fill in the blanks later.Happy boating.

 

[Solittle]

Re: my boat wont plane either

DSL - First, where is the cavitation plate relative to the bottom of the hull? Post back on this.<br /><br />Next - <br /><br />"what it does is gets up pretty good then about 3 secs later feels like someone put a snow plow on front and the rpms start screaming till i back off rpms almost sound like im runnin it in gear full throttle no load and i get sprayed from the plow" When this happens is the bow high or low? If high you need to tuck the motor in (get the prop closer to the transom).<br /><br />Does your prop have a cotter pin to secure the prop or does it have a rubber hub? If rubber hub you may need to get the prop rehubbed as it may be slipping.<br /><br />You should have no trouble getting on a plane and you should clip right along in relatively calm water.

 

[Jack Shellac]

Re: my boat wont plane either

Sounds to me like the prop is spinning on the hub, too. Scribe a mark on the prop position relative to the hub and see if it moves. Any prop shop can check it for you too.

 

[DSL DOC]

Re: my boat wont plane either

hi guys bart yes boat is new to me <br />guys this gonna sound stupid but i cant find where the cavitation plate is, is it the flat plate right on top of prop or is it the next flat spot on bottom of mid section where about a 1 inch slot goes all way around not sure ive looked in seloc manual and nothing on this also<br /><br />i had the slotted are real close to bottom of transom as was when i got it then i tried raising and lowering a bit to see if owuld help but i can confirm this with little knowledge<br /><br />SO LITTLE----boat gets up pretty good for 3 secs bow up pretty high not crazy high though then when starts plowing bow is down for most part. i did try all the tilt positions on the mount and nothing helped all in all was same in any position. According to seloc and what looks like to me is the prop is locked on by cotter pin through a black plastic cone doesnt seem to have rubber hub but could be wrong. thanks for help get back at me you experts and dont laugh you had to learn one time also lololol i can rebuild the motor but dont know what cavitation plate is LOLOLOL ps i was looking into those trim tabs to help stabilize boat in wind and somewhat rough lake waters is it true about the weight thing up front helping it

 

[DJ]

Re: my boat wont plane either

DSL,<br /><br />The cavitation plate is the one directly above the prop. It should be even or slightly (1/2" to 1") above the keel (bottom).<br /><br />It sounds to me like your engine is set too deep. The boat is "plowing".

 

[DSL DOC]

Re: my boat wont plane either

the keel is the centerline of the bottom of the boat right so it shoudl be set according to the lowest part of the keel or the transom bottom

 

[DJ]

Re: my boat wont plane either

DSL,<br /><br />Boat bottom. A 1/2" to 1" above the keel bottom should be the boat bottom.

 

[DSL DOC]

Re: my boat wont plane either

one thing i should have added was my boat is only a v bottom to a ceretain point from front to rear then is flat if that makes any diff

 

[DJ]

Re: my boat wont plane either

DSL,<br /><br />No difference. Same rules generally apply.

 

[DSL DOC]

Re: my boat wont plane either

hey johns im sorry bout this but thanks for your help if the centerline of the bottom of boat is called keel on mine the centerline or "keel" is alot lower than the bottom of transom considerably lower im thinkin you sayin to have it set to the bottom edge of transom right? again apologize tryin to get most things out of way for troubleshooting also if i set it also if i set cav plate where you say im right at top edge of transom for mounting screws i might use a thin piece of wood to help distribute psi on inside of transom

 

[Solittle]

Re: my boat wont plane either

We may be getting tied up with terminology. The cavitation plate is a horizontal flat surface of the lower unit just above the prop with the engine down. The engine must be installed so that the prop has a clean bite at the water. Usually this means that the engine mounts must be raised or lowered so that the cavitation plate is even with or just above the flat bottom of the hull. If the motor is set to high the prop will not get the bite that it needs.<br /><br />That is the first step. Next the thrust from the prop must not raise the bow too high or push the bow down too low. This is also where loading of the boat is important so that the weight is even ly distributed. This adjustment is made by changing the vertical angle of the motor which also changes the centerline of the thrust from the prop.<br /><br />If the exhaust from the motor is through the center of the prop, you have a rubber hub. <br /><br />Check the hight of the cavitation plate & try it again. Also you said that you backed off when it started screaming. This tells me that you may have a prop that is not suited for your boat. If it has far less pitch than it should then when you put the throttle to it, it may start to cavitate (meaning it spins like crazy but does not work). Try again but advance the throttle more slowly to avoid any cavitation.