Rear heavy

[wayno60]

As you know i just got the 70yam fitted to the 4.75 bluefin. The prob i have is that it seems, well infact it IS rear heavy. I know theres nothing else in the boat atm but as i lift it off the tow bar she,s very light with hardly no weight on the ball.
On the way home on friday it towed like a dream, no swaying at all.

Its that close to balanced i cant walk down the stern as it will tip up...when on the jockey wheel.

I had a squiz under the trailer and i could move the whole suspension back about 5 in, cant hurt can it??
plus once the usual shit go's in that should sort it?????

[deckie]

geez that must have been a bit disconcerting balancing like that. Shouldnt have been THAT much diff in weight.
Could you lift it off the tow ball single handed before the new donk ?
You sure they didnt sneak half a dozen old 200Ahr AGM's onboard and hide them down back as well ?
I'd say u might be moving the axle back, hopefully one of the trailer experts in here sees this asap.
Good luck..sorry cant help coz feel its a job for an expert to get right first up.

[wayno60]

Bud its a new trailer to this boat, the boat that was on this trailer was a half cab glass so plenty of weight up the front.
All the suspension is bolted to its own frame and the frame of the trailer bolts to that., So it just a matter of undoing 8 u bolts and slide the wheel, axel, spring assemble back 5 inchs. ill get a pic tomorrow.

[barra71]

Hay wayne i had to do the same when i got mine fitted mate. I moved the axel back 4" and she was all good. towes good after i moved it back and good weight on the ball now and no sway.

[Chas & Clarry]

I realise that this is not always possible and that you probably already thought of it, but is it not easier to move the winch forward a bit? We did this on a previous boat and 75mm made an enormous difference.

Tim and Trace

[NAGG]

Yeh - you clearly need to move the axle back .... .the wondering all over the road was a good indicator that there was not enough weight on the tow ball .

Chris

[purnong]

I would put all your gear in first and see what it's like then look at moving the axle back
Mate had to do the same thing recently with a 4.1 Brooker after he changed from a 30hp manual start to a 40hp electric start PTT
Actually he is now having problems with the boat being arse heavy in the water as well, Hopefully you should be Ok there

[Fed]

The swaying doesn't usually kick in until 80-90KPH and more often than not it's when you're going down a hill.
Not what you'd call the best time to find out you've got a problem.
You might have dodged a bullet Wayno.

[wayno60]

the wondering all over the road was a good indicator that there was not enough weight on the tow ball .

On the way home on friday it towed like a dream, no swaying at all.

nagg mate you reading the same post......

T and T,
My drive way from the road to the house go's up hill so as i reverse in the gap between the bow spit and the back window of the canopy on the ute decreases to the point that im not willing to take a chance of popping a hole in the rear window. Moving the winch post forwards will only increase the problem. so the axels it is..

[propdinger]

you will have to move the axle back which is no big deal just undo the ubolts and jack it up and move the axle back. that's exactly why they are made the way they are cause every boat is different i bought a new trailer recently and had to move mine around a few times to get where i was happy.

[Triple]

If you are going to move the axle, do it right the first time and make sure the tow ball weight is around 10-15% of the ATM (whatever your usual load is). Saves adjusting it numerous times to get it feeling right.

[wayno60]

Triple, so is that all you need ? i really thought it would have been more than that....

Anyway heres the trailer
002.jpg003.jpg005.jpg004.jpg001.jpg

in pic 2, that bar that the rope is tied off to is the frame for the susspension, just undo the u bolts and slide back......thats my thinking.

[Kero]

How far forward, from the transom, is that rear roller? From the last pic it looks to be a lot of boat overhanging the last rollers!

[Greg P]

I would move that winch post forward a few inches and check the weight on the jack. It may just be enough rather than rooting around with the axle.

[NAGG]

nagg mate you reading the same post......

T and T,
My drive way from the road to the house go's up hill so as i reverse in the gap between the bow spit and the back window of the canopy on the ute decreases to the point that im not willing to take a chance of popping a hole in the rear window. Moving the winch post forwards will only increase the problem. so the axels it is..

Sorry - misread it ......... but if it is as balanced as you say then it is actually not a good set up for towing & specially at speed . A boat of that size (wt) - an average bloke should pretty well be able to step up on the transom without the boat tipping up (close to it anyhow)
This should be checked with your normal gear / fuel on board though

Chris