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Old 08 October 2019, 04:00   #1
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Country: UK - England
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SR4 trailer and flooding hull

After a number of years with a Bombard 380 after selling our old rib, have recently purchased an old SR4.


I've had a trawl through the massive amount of information on here regarding SR4's, which is really useful, but couldn't find anything on the below and wandered if anyone could help?

The trailer is really tail heavy at present, it tows fine (ran 130 miles home with it after buying it with no problems), but when unhitched have to drop the jockey wheel completely down otherwise will tip backwards and sit on the lighting board (which is pushed back in in the photo, incase it tipped up when I unhitched). So need to move the axle. Wandered if anyone had a similar set up and knew a good starting point to work to. Is a Yamaha 2 stroke 40hp, with a 30litre fuel tank in the stern and the trailer is a Hallmark Premier - I think an old Indespension?

Secondly - there is a rubber flap over the flooding hull opening in the transom and wandered if this is normal - think the ones I've seen in photos don't seem to have them and wandered why it had been added or if it was original? So it takes longer to flood the hull, so if only stop briefly then it doesn't fill before you pull away?

Thanks

Hartley
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Old 08 October 2019, 04:59   #2
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There's some pics of my old one on the thread below on a nearly identical trailer to give you a rough idea.

Nearly finished the SR4...


The flap, yes-exactly what you said. I did that to mine too-it meant in rough seas the boat was more responsive as there was a delay in filling the flooding hull, but I got the stability at rest.
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Old 08 October 2019, 05:15   #3
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Looking at the rollers you could move the boat forward on the trailer a little - if the winch post would allow it. (Could the winch post move forward a little?
Move the axle back a few inches - IIRC they're only clamped on.
I'd put the fuel tank under the seat rather than in the stern. There should be space for the battery forward of the tank. Just!
My SR4m was on the same trailer and it was ideal after a little setting up. I think I may have set up the rear rollers lower than the front ones which allowed the boat to sit further forward on the trailer and easy to roll off when launching.

The flap isn't standard - but probably useful..can't see it doing any harm.
The drain in the transom is also an addition.
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Old 08 October 2019, 10:52   #4
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Nos4r2 - thanks for link to photos - gives a good idea.

Searider - thanks too - agreed, think that it may well be possible to move winch post forward and adjust rollers so it all sits further forward. Will have a go at that and see whether is enough before deciding to move axle. Agreed re fuel tank, am going to measure up and see if can get one which will fit in under the seat.
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Old 15 October 2019, 02:36   #5
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As per the above, simply move the axle back. Chances are the U bolts securing the axle may need replacing - easy and cheap enough to order from eBay
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