1988 V20 with 225 Honda

could it be timing?

[macojoe]

Well I did not see what year your boat is??

But you say its 2820# ??

Dry weight from factory on a 1985 CC, is 1920# you are 900# over weight!!

According to Loadrite trailers, there single axle bunk trailer is 675 to 700# depending on which one you get.

trailer 700 + motor 610= 1310 + boat 1920 = 3230 + gas 360 = 3590 + mis 200 = 3790 + T top 130 = 3920 total weight

4820 - 3920 = 900# over what you should be??

Better check for a hold of dead mackrel!! :o

[reelapeelin]

Jackman, it does sound like you may have some extra weight there, but add T-Top, anchors, batteries and other rmisc. items can add up...


as for as your top-end, I'm conviced repropping will get more speed and allow your Honda to spin up to it's max RPM...did you ever get in touch w/ these guys??...they make props FOR honda and are very knowledgable about matchin' props to various rigs...they made mine and it's gettin' all there is from my motor...very happy w/ it ;) ;D

http://www.ptprop.com/

click on ''need help?"...

[jackman1939]

I call the prop place you suggested. Talked to Jeff. He told me I should go to a 15 or 14 pitch prop (same 14 1/4 diameter). He said that would get the RPMs up there, and put less of a strain on the motor. He said to stay with the 4 blade. Only problem is his props were $523 !!
Checked around the net and the closest prop I could come up with was a 14 3/4 X 15 - aluminum 4 blade prop for ~ $ 130.
Not sure what to do. I do think the boat is too heavy (for some unknown reason) - if it were 900 lbs lighter, I'm sure the 17 pitch prop would be ok.
???

[pikfish]

Simple math should tell you that you should not have to drop to a 15" pitch prop to solve your problem. If anything you should need a 21" or 23" pitch to avoid over reving. With a 15" pitch and a 5500rpm red line your max speed will be some where in the mid/low 30"s.

[pikfish]

I suggest that you should test the boat out on a calm day with a light fuel load and just you onboard. This should give you an indication if your problem is weight sensitive. The first test you listed you were carrying 900lbs+ 360lb in passengers and 360+lb in fuel, on the second 600lbs+ plus & fuel. Running alone with a light fuel load you could be as much as 1000 lbs lighter! If this does not make a big differance in the speed/rpm than your problem is probably not a weight related one.

[jackman1939]

Thanks for all your comments.
The red line on my motor is 6200 rpm. WOT only gets me to 5300. The prop people tell me that I am bogging down the engine going at WOT and only getting 5300 rpm.
After checking the web to see what props are available for my motor, I see very few props that have a pitch less than 17. Most are 17 to 21!
Still think there is something wrong with the boat.

[jackman1939]

I will take the boat out with just me and a little fuel. Will let you know what happens.

[turbinedoctor]

I have a 14 X 17 three blade prop on my 90 hp and can get 4800 rpms trimmed up. I think a 225 should need a larger prop than this.

[jackman1939]

Going to Denver for a week to visit my son and his family. Be back on the 8th. Will do some more testing on the V20 them.
Thanks for all your help.