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planing off
keithg 
 		  Home: baldwinsville , ny   07/17/2007 21:54
Brookie
Posts: 22
 

am having a heck of a time getting on plane.get close,never quite there.2655 bayliner cierra,28ft,10-6 beam,8900 lbs dry.single 89 460 king cobra -re-powered with 28 hrs.can now run her a little.o.manuel says 4400-4800 max rpms.i took her to 4400 first time sat.,went 5 mins.approx. and still she wouldn't come up.have tried tabs all the way up and bump down,all the way dwn to pop the back up and bump up,and some things in between.at 3700 rpms i make 10.1 mph on the gps.any tips?other than sell and start over.
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Re:planing off
hondacat 
 		    07/17/2007 22:08
Moderator
Posts: 664
 

what pitch prop? are sure it has the rite gear ratio lower unit ?
are you sure the shift cable is adjusted corectly ?
If shift cable is not adjusted rite it makes the ignition missfire with the smaller motors you can tell by the motor shaking violently , seems with the big blocks its hard to tell its interupting
if it has any of the above its going to be like you sai
just some things to check

if you ove rev the motor look out for one of these coming out at you LOL

let us know we will fix it up

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Re:planing off
keithg 
 		  Home: baldwinsville , ny   07/17/2007 22:36
Brookie
Posts: 22
 

prop is 15x15.lower unit is original.will have shift cable checked.will let you know.frgot to mention,doesn't hold steady rpms.will drop 500r's and then charge up.also some backfiring.maybe the shift cable?
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Re:planing off
FLATRATE 
 		  Port: Manistee   07/23/2007 07:21
Admin
Posts: 463
 

I have the same boat , mine is 9'6" beam and had the 270h.p./ 350 OMC Cobra engine , was very underpowered. I repowered with a 388 stroker motor that makes approx. 340 h.p. and it is like a new boat.Has all the torque I need to get the boat on plane with out using the trim tabs and it runs in a following sea with out bogging down at all , over all very happy with the way it runs. I did have to play around with the props like Frank said to get it running the way it is now , I think I have a 14.5x15 on mine and I have a 4 blade 15x16 that works good but hard to get my trolling speed down low enough.. I did add an electronic ignition to the OMC / Prestolite distributer and it runs good but not very happy with the way the shift interuper works with the setup (I did follow the directions for it), would like to find a new factory electronic igniton for it. Maybe a Mercruiser or Crusader if they would fit and still work with the shift intrerupter system that OMC use's.The boat should not be losing power/RPM's and backfiring as you say yours is , find that problem and you will probably find it runs the way it should.I know for a fact these boats are not speed demons and mine will cruise real nice about 23 to 26 mph and run wide open at about 33 mph depending on wave conditions and number of people on board. Over all I have been very happy with the boat for the price I paid for it.
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Re:planing off
keithg 
 		  Home: baldwinsville , ny   07/23/2007 22:02
Brookie
Posts: 22
 

well...after being towed in,engine quit,it seems a pin in the new distrib. broke.jasper guys were in town for the syracuse nationals and had some ideas.they are standing behind their product.this is engine #2.first one blew distributer gear into a millon pieces.after new distrib. she seems much better.almost on plane @3000,tries hard but not quite.i have a new carb. on order.old one is kaput.am trying an edelbrock (spelling?).i think that will do it.and i know the boat won't be a rocket but 10.1 @3700 rpms was way slow.and thanks for the replys.mike did put an after-market up-grade on my shifter,much smoother.no long delay w/ low rpms between gears anymore.if you want his number to find out what he did let me know.and i thought it was nice of the jasper guys to test ride the boat.my oil pressure has been a tad high.if the lighter oil they suggested doesn't lower it in a few more hrs.they are going to replace the pump.and pay labor.sorry for the length of post.will try to be brief in future.and i like the boat overall.cabin is wonderfull on week-end stays and the ride is nice smooth and dry.i'll post after this next re-pair and see what happens.
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Re:planing off
keithg 
 		  Home: baldwinsville , ny   08/03/2007 22:29
Brookie
Posts: 22
 

well....heading in the right direction ithink.new carb is on.mech. test drove her.still have fuel issues.now need a new fuel pump.still cuts out off and on when cruising.and am trying a different prop.hopefully next week she'll run,at least b-4 the salmon do although i wouldn't need much juice for harbr patrol!and frank,i'm saving gas money for that road trip.you take trades?
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Re:planing off
hondacat 
 		    08/03/2007 23:52
Moderator
Posts: 664
 

you need one of these !

looks like you are going to get it dialed in . keep at it the worse part sounds like it is over


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