Hi all,
After taking my boat for a water test i am sure the engine is to low (throws a rooster tail). I went back to the boat shop to get it lifted but they assured me it was in the correct position and i may need to look at fins and weight distrubution.
I have always been under the impression the cav plate should be about inline with the bottom of the hull? is this true? At the moment at half trim it is parrallel but 40mm below the line of the hull.
Any insight would be good.
Cheers.
Jeff.
Originally Posted by jeffo
Jeff, what boat/motor, my motor trimed straight up n down, the cav plate is about 40-50mm above the lowest part of the hull, maybe a bit more, like you have done, take it for a run 1/2 loaded and 4500-500rpm, have a look at the cav plate, should be just above the water
Daz
What's the boat/motor combo??
Rough rule of thumb is cav. plate should be level with or slightly above the water when your cruisin' along.
That setup you have sounds really deep to me. Way too deep.
I intend on living for-ever....so far so good
its a haines 445 with a 70 tohatsu. Seamed to deep to me from when i put the throttle down....but they tell me other wise.
They just sound lazy Jeff and don't want to do it and as I said when I was around there the other day, it is obvious it should go up a hole or two. Do it yourself. It is no biggy.
Is it a full on ski boat? if not up 2, 3 even.
cheers fnq
yup get it up there!
Who is fitting the motor? It sounds like they are pretty well off the mark. Normally you set it flush with the hull then start lifting until you get problems
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thanks guys, i will lift the engine myself when i work out how.
Cheers.
Study these pics and go for a run and compare, Borrowed these pics from the Verado club site.
Ron
Make something Idiot proof and they make better Idiots
Here's a pic of mine, it needs to be lifted up by 2 holes
Make something Idiot proof and they make better Idiots
Jeffo,
For a glass boat, with a transom mounted engine thats not on some type of stepped pod setup (even factory), the cav plate wants to be level with the keel to approx 25mm above for good "all round" performance.
40mm below is too low. Don't return to your dealer because he is clearly a fool with no idea on setting up boats. You don't need knowledge to become an outboard dealer. Just need money and then rely on your allegedly knowledgable staff.....
With the prop that low in the water you would probably be unable to achieve correct WOT rpm's, uless they have propped accordingly for their "low rider" setup! This in turn will load up the engine which in turn leads to shortened engine life.
cheers
I just had my motor off and back on again a couple of weeks ago.
Biggest thing to be sure of is that the seal around the bolts through the transom is not broken.
I removed my bolts and cleaned out the transom holes, then refitted them with sika to make sure i wasn't getting any water through there (I have an unexplained little bit of water getting in somewhere, wasn't the transom bolts!)
If the bolts are well sealed it is an easy job to lift it up and down with a chain block. I did mine by myself, but 2 sets of hands would certainly make it easier to line up the motor on the transom bolts etc.
cheers
Mick
Jeffo, my 60 merc is about 20 mm above the keel line on my V146c. I had it another hole higher and was mostly OK but I took it back down again.
Not hard to do. I parked it on grass with chocks on the wheels, trimmed to outboard down to vertical, and used the jockey wheel to raise and lower the transom. Easy job with 2 people.
Jeremy
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