bacon100 Posted November 23, 2008 Report Share Posted November 23, 2008 HI im a newbe to your board . I have a 21 foot hullmatic with a 130hp penta inboard and can't get up on the plane could any one tell me if the the self adgusting trim tabs work? I rearly don't want to shell out Quote Link to comment Share on other sites More sharing options...
TomBettle Posted November 23, 2008 Report Share Posted November 23, 2008 Hi Bacon Welcome to Poole Bay. Do you have a picture of your boat? Assuming she is a planing through to semi planing hull then I think you have a more fendamental issue if you are not get up with 130Hp in 21 feet. That's bags of Hp to pop you up and fly you along. Trim tabs may give a marginal boost to get you up, but that is not their purpose. They will give a hell of an improved ride once you learn to use them effectively in different sea conditions. Once again welcome and post a pic we'll see if we can help. Tom Quote Link to comment Share on other sites More sharing options...
Coddy Posted November 23, 2008 Report Share Posted November 23, 2008 Have a look at Trickett Marine's web site, they are local and their trim tams are really good, I have them on my boat. http://www.trickettmarineproducts.co.uk/trimtabs.html They get my boat on the plane ok Coddy Quote Link to comment Share on other sites More sharing options...
bacon100 Posted November 23, 2008 Author Report Share Posted November 23, 2008 If this has worked you should have some photos to go on Quote Link to comment Share on other sites More sharing options...
plaicemat Posted November 23, 2008 Report Share Posted November 23, 2008 And the other end? Terry. Quote Link to comment Share on other sites More sharing options...
Coddy Posted November 23, 2008 Report Share Posted November 23, 2008 (edited) Hi Darrell Welcome to the forum Would love to have a chat with you sometime about Volvo leg's. Have a similar one to you by the looks of it, mine is a AP275. What size prop have you managed to work it out to? I am running a 15x19 but I think this is too high and was thinking along the 15x17 or 15x15 to allow the revs to get up. I am running a Ford 2.5ltr desiel turbo. To get back to the thread, if you want to have a look at the Eltrim Trim tabs on my boat give me a shout. Coddy Edited November 23, 2008 by Coddy Quote Link to comment Share on other sites More sharing options...
mw Posted November 23, 2008 Report Share Posted November 23, 2008 what speed will the boat do and at what revs mark w Quote Link to comment Share on other sites More sharing options...
Brian Posted November 23, 2008 Report Share Posted November 23, 2008 From the back, the underwater profile look about the same as mine. What's the displacement? About 1.5 tonne at a guess, which would be about 86hp per tonne. Less than 50hp per tonne planning will be difficult, at 64hp per tonne planning should be easy, so unless she displaces more than 2 tonnes she should plane easily. 1. Is your engine running right? 2. Are you getting max revs? 3. Is all the weight at the back? Quote Link to comment Share on other sites More sharing options...
bacon100 Posted November 23, 2008 Author Report Share Posted November 23, 2008 HI thanks for all the replys ,first if you click on the photo it will give you a look at the front and side , it is runing fine now after a top end rebuild. Its a aq130 on a 270 drive with 2.15 gearing At the moment its got a 14.5 * 13 prop and reves out to quick so will go back to the 15*15 it came with all though it still wouldn,t plane its so close but the back just seams to squat down to much.I think maybe your right Brain its got all the weight over the back. Im told its around the 2 ton mark .Im working away this week so will not get to see the replys till friday but thanks again and I look forward to days out meeting some of you out there .Darrell Quote Link to comment Share on other sites More sharing options...
TomBettle Posted November 23, 2008 Report Share Posted November 23, 2008 Nic semi displacement hull, but it does look like it might prefer a shaft drive over an outdrive and so it could well be weight distribution. I take it you have the leg trimmed right in when you hit the throttle? Tabs may well help you get out of the water a little quicker, but that HP should have no issues getting you up and running. Is the engine definitely getting it's Hp? Tom Quote Link to comment Share on other sites More sharing options...
Member Removed Posted February 24, 2009 Report Share Posted February 24, 2009 Hi, Just to bring this back to the top as Darrell is still having trouble with planing...... We were out playing with the prop/whale tail and engine trim over the weekend and nothing we did made much difference. We have tried hanging two large people over the front and even that didn't pop it onto the plane! Current symptoms: Engine trimmed in to max (pin placed in closest hole to transom) Engine revs to 4200rpm when excelerating in gear, front bow rises, rear squats and that is it! It feels as though the engine still needs to be trimmed in some more but there is no movement left. All appears to be original so if it should plane everything appears to be as it should be. We did get it to rev to 4600rpm at max revs with two people hanging of the bow but it was no nearer to planing..... As we are making peak revs at full throttle we are really not sure where to go from here, any suggestions? Cheers, Darren. Quote Link to comment Share on other sites More sharing options...
Brian Posted February 24, 2009 Report Share Posted February 24, 2009 As I said before your hull looks identical to mine. Sounds to be behaving that same as my boat was before I fitted Bennett trim Tabs. She was lifting the bow and squatting at the stern, due to all the weight being at the back. After fitting 18" x 12" trim tabs she leveled off and planned. I bought mine from Magic Marine at Broadstone. Due to rot in the internal timber I've advertised my boat as a renovation project, if it doesn't sell in a couple of weeks I'll be stripping everything off and selling the bits, so might have a set of Bennett tabs going cheap. Quote Link to comment Share on other sites More sharing options...
Member Removed Posted February 24, 2009 Report Share Posted February 24, 2009 Thanks for the reply Brian. We are considering making some temporary trim tabs to see if it makes the difference. If you are selling yours please let either me or Darrell know. Cheers, Darren. Quote Link to comment Share on other sites More sharing options...
Adam F Posted February 24, 2009 Report Share Posted February 24, 2009 making some temporary trim tabs How?? This sounds dodgy... do you mean temporary doel fins? If you mean temp trim tabs, how will you do that? Persoanlly, I'd suggest a power issue, as 130hp should be more than enough to plane the boat - unless it is heavier than it should be, i.e water logged, and than tabs will be a temp cure, and not really solving the main problem.... Its hard to tell over the internet. Quote Link to comment Share on other sites More sharing options...
Brian Posted February 24, 2009 Report Share Posted February 24, 2009 Darren I've sold the boat, so won't be stripping it. Quote Link to comment Share on other sites More sharing options...
Coddy Posted February 27, 2009 Report Share Posted February 27, 2009 Darren I have a set of doelfins which I took off my volvo leg if you are interested. Coddy Quote Link to comment Share on other sites More sharing options...
bacon100 Posted February 27, 2009 Author Report Share Posted February 27, 2009 Coddy you have pm sent. Quote Link to comment Share on other sites More sharing options...
bacon100 Posted March 2, 2009 Author Report Share Posted March 2, 2009 Coddy and trever good to meet up over the weekend, the out come is that the doelfins do seem to lift the stern; but the bow is still pointing up to the sky .trim tabs are now on order. trev the 15x15 you lent me will only get 3200-3400 rpm and i pulled 4200-4400 with a 16x13 so im going to get the pitch checked if thats ok ,maybe its been re done at some time because that does not add up to me . Thanks again for your help ill let you no the outcome Darrell Quote Link to comment Share on other sites More sharing options...
Maverick Martin Posted March 21, 2009 Report Share Posted March 21, 2009 As you have looked at this from all other angles what about checking out the turbo to ensure that you are getting the full boost pressure. Just because you can pull max revs with an egg whisk doesn't necessarily mean you are getting full power from your unit. If your not getting full pressure then the engine will not turn an adequately sized propeller to give you the performance you need/should have Just a thought Quote Link to comment Share on other sites More sharing options...
bacon100 Posted March 22, 2009 Author Report Share Posted March 22, 2009 Hi my motor is non turbo its the old aq130 4cyl petrol .It now runs well after a rebuild so the power should be some where around the 130hp mark ,thanks for you input though .Darrell Quote Link to comment Share on other sites More sharing options...
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