Scarab 300 help
#11
Might be easier to find the cleavers or the mirages floating around also a lot cheaper ----I have a pair of 23 cleavers you can try on the boat but I do not want to sell them. have to dig them out from one of my old boats.... Call me if you want to try them out ------440-967-6683
Jim
The cleavers will give you more top end but they are tricky to come on plane some times.
Jim
The cleavers will give you more top end but they are tricky to come on plane some times.
Last edited by cigboat1; 07-24-2014 at 08:38 PM.
#12
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Joined: Nov 2004
Posts: 14,104
Likes: 3,692
From: On A Dirt Floor
Those motors are fine, but you must remember several things:
1) Your peak hp will be somewhere around 5500-5800rpm. The cam specs you gave are the Comp Magnum 280H Flat Tappet Hydraulics. Those where used millions of times back in the 80's + 90's. Not in boats much. Not that that means anything, but more that I and millions of other know where they perform up to.
I'd prop for 5400-5500 rpm first. And maybe try a little higher from there.
2) They are 350's. You have a heavy boat that sits/rides in the water a lot. Don't overload them, let them get to the rpm they make most power. They should start to sing nice from 4800rpm and up.
1) Your peak hp will be somewhere around 5500-5800rpm. The cam specs you gave are the Comp Magnum 280H Flat Tappet Hydraulics. Those where used millions of times back in the 80's + 90's. Not in boats much. Not that that means anything, but more that I and millions of other know where they perform up to.
I'd prop for 5400-5500 rpm first. And maybe try a little higher from there.
2) They are 350's. You have a heavy boat that sits/rides in the water a lot. Don't overload them, let them get to the rpm they make most power. They should start to sing nice from 4800rpm and up.
#13
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Joined: Jun 2012
Posts: 231
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From: Toledo, Oh
Might be easier to find the cleavers or the mirages floating around also a lot cheaper ----I have a pair of 23 cleavers you can try on the boat but I do not want to sell them. have to dig them out from one of my old boats.... Call me if you want to try them out ------440-967-6683
Jim
The cleavers will give you more top end but they are tricky to come on plane some times.
Jim
The cleavers will give you more top end but they are tricky to come on plane some times.
#14
Thread Starter
Registered
Joined: Jun 2012
Posts: 231
Likes: 0
From: Toledo, Oh
Those motors are fine, but you must remember several things:
1) Your peak hp will be somewhere around 5500-5800rpm. The cam specs you gave are the Comp Magnum 280H Flat Tappet Hydraulics. Those where used millions of times back in the 80's + 90's. Not in boats much. Not that that means anything, but more that I and millions of other know where they perform up to.
I'd prop for 5400-5500 rpm first. And maybe try a little higher from there.
2) They are 350's. You have a heavy boat that sits/rides in the water a lot. Don't overload them, let them get to the rpm they make most power. They should start to sing nice from 4800rpm and up.
1) Your peak hp will be somewhere around 5500-5800rpm. The cam specs you gave are the Comp Magnum 280H Flat Tappet Hydraulics. Those where used millions of times back in the 80's + 90's. Not in boats much. Not that that means anything, but more that I and millions of other know where they perform up to.
I'd prop for 5400-5500 rpm first. And maybe try a little higher from there.
2) They are 350's. You have a heavy boat that sits/rides in the water a lot. Don't overload them, let them get to the rpm they make most power. They should start to sing nice from 4800rpm and up.



