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#1
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Re: New Dash
Fishbone...what prop you got??...even w/ only 120hp she oughtta get up on plane and stay there w/ several people on...have ya got a workin' tachometer and do ya know the MAX recommended RPMS from the mfgr?...sounds like your motor in bad need of tune-up or other repair OR boat needs re-propping OR both... ;)...are ya gettin' fire on all cylinders?...
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha 
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#2
10-19-2006, 10:35 PM
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Re: New Dash
not sure what prop but the engine has only got anout 20 hours on it would i need a tune up or is somthing else wrong but about the cilinders my last engine it was a six cylinder and this one is a four cylinder and it is the second new engine i have tried. i only had to pay for one but the first one i had that was the problem it was only runnin on three cylinders but thisone has had a compression test and all four are firin. but what prop should i order. i do have a workin tach and get about 3800 rpm WOT i am not sure what the max reccommended rpm is. thanks
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#3
10-19-2006, 11:05 PM
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Re: New Dash
Do some lookin' around to find out what Max RPMs you should be able to turn...it's KEY to makin' sure you got the right prop...
If motor change took you from 6 cyl to 4 cyl a prop change could most likely be in order...less torque, less hp?...need to know ;) :) ...
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'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha
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#4
10-19-2006, 11:33 PM
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Re: New Dash
ok i will do that
just out of curisoty what would you guys think if someone put nitrus oxcide on their engine i saw it in the boating magazene it was an old issue (july 2002) but what would that do to an i/0 ses it adds 100 hp and 10mpg. p.s. i dont like this new engine and am probable going to replace it next season. the engine is ecanomical ( spelling *???) but not very powerful i like power and *do not really care about economy kind of like comparing a hybrid to a hemi *i would much rather have the hemi.
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#5
10-20-2006, 01:52 AM
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Re: New Dash
on my 165 I/O I was getting 5000 rpm's!! You are way down!!
Some I/O get 4500 rpm but you have a way to go!! something wrong with motor?? You getting full throttle?? Or you need new prop??
__________________
1986 V20  Old Fishermen never die, we just SMELL that way!!
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#6
10-20-2006, 01:54 AM
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Re: New Dash
The N O won't do ya much good w/ out the right prop, there, Hot Rod... ;) ;D ;D ...
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha
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#7
10-20-2006, 06:40 PM
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Re: New Dash
Quote:
what prop would you guys reccommend
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#8
10-20-2006, 06:55 PM
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Re: New Dash
On my boat I use a 15 1/4 X 15 it has a lot of torque and works well for me.
Do you have a Hydrofoil on the motor?? That helps alot!! Are you sure you are getting full throttle?? Make sure of that first. My mariner alowed me to talk to them, then they recomended a prop, they let me try, if no good and still perfect they would swap for the next size till I got what I wanted. I used 3 props. Over all a 14 1/2 X 17 worked, but I always felt like I was spinning my tires when getting out the hole. Thats when we found the 15 and now out the he great!! little slower on the top end, I use o get 40- 43 mph now I get 36-40 depending on the load.
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1986 V20 Old Fishermen never die, we just SMELL that way!!
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#9
10-21-2006, 08:33 AM
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Re: New Dash
Quote:
If you had OB, I'd take a stab at it, but an I/O HEY GUYS!!...another thing ??? ...any gear-reduction issues goin' on here...his outdrive originally w/ a 6 cyl...now has 4 cyl...any gearing goin' on in his outdrive ??? ...
__________________
'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha
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