Originally Posted by Sibfisherman
I have an Excel Vanguard 395 sib with a 20hp Honda shortshaft outboard . I have been out a few times now but it does not seem to be performing as I would of expected. The bow is always pushing down and the top speed is about 18mph with 2 people and some fishing gear.
The Honda is 17inches long but the transom is only 15inchs so the AV plate sits 50mm below.
I have tried the trim all the way up to the 4th hole but starts to cavitate so I'm running on the third hole.
I have tried a 25mm packer under the engine but can't get the clamps to sit inside the plastic plate on the inside. I'm thinking of making an aluminium extension to raised by 50mm and sandwiche this over the transom then bolt it on.
Has anyone else had these problems with the excel vanguard boats?
Or... Am I expecting too much from this setup.
Thanks for listening to my rant
Not a Vanguard but a 390 Volaire. I played about with trim/packers/props when I got my SIB. I went full circle and now run with the engine sat on the transom & trim pin I next to bottom hole. 17kn flat out in perfect conditions lightly loaded. Our normal configuration is 2 up/fishing gear/20l fuel/anchor etc. I did change the prop to a 10Ē which now tops out @5700RPM.
Packing up the engine on the transom caused unacceptable blow out in turns & lumpy water. As did raising the trim.
Itís now as good as itís going to get & Iím happy with it.
As Steve says, make sure you have the tubes/keel at the correct pressure & distribute the weight, I sit at the transom & the missus sits up front. I use a zodiac fuel bladder which sits on the port side as far forward as it can go.