Sea Ranger
Active Member
Good to know.... Thanks
And remember....Keep your tip up!!!
2 stroke question
- Thread starter Sea Ranger
- Start date
And remember....Keep your tip up!!!
Sea Ranger
Active Member
I finally got a chance to get the boat out on the water. Motor works just fine, It was nice and calm out on the water so it was the perfect day to get out. WOT the motor revs at 4900 rpm and you can hear that its screaming at that rev so I brought it down to 4500 rpms and everything felt smooth and ran great. 30 miles an hours fully loaded boat and 3 guys. There is nothing wrong with my motor or running it at the revs I am. You can hear that the motor likes it at 4500 rpms and anything higher is going to blow the motor up.... you can hear it!!! Thanks to everyone who helped me out with this.... I learned a lot about my motor, found I can run it at 4500 rpm... in fact it liked it and I picked up about another 10 miles an hour too. I'm not going to reprop.... no need too. Thanks again..... Steve.
Also picked up 2 hali's ... a 25 and a 15 pounder.... was a great day!!!
And remember....Keep your tip up!!!
Also picked up 2 hali's ... a 25 and a 15 pounder.... was a great day!!!
And remember....Keep your tip up!!!
Sea Ranger
Active Member
I finally got a chance to get the boat out on the water. Motor works just fine, It was nice and calm out on the water so it was the perfect day to get out. WOT the motor revs at 4900 rpm and you can hear that its screaming at that rev so I brought it down to 4500 rpms and everything felt smooth and ran great. 30 miles an hours fully loaded boat and 3 guys. There is nothing wrong with my motor or running it at the revs I am. You can hear that the motor likes it at 4500 rpms and anything higher is going to blow the motor up.... you can hear it!!! Thanks to everyone who helped me out with this.... I learned a lot about my motor, found I can run it at 4500 rpm... in fact it liked it and I picked up about another 10 miles an hour too. I'm not going to reprop.... no need too. Thanks again..... Steve.
Also picked up 2 hali's ... a 25 and a 15 pounder.... was a great day!!!
And remember....Keep your tip up!!!
Also picked up 2 hali's ... a 25 and a 15 pounder.... was a great day!!!
And remember....Keep your tip up!!!
SeaRanger, I've been holding off replying here until I had some definite #s for you.
I've got an Arima SeaChaser 17, which is 200 lb lighter than your SeaRanger. 2000-115 v-4 2 stroke Johnson, running a Viper Stainless prop, 13 7/8 X 17 (3 blade). 3 guys, full gas/extra gas/full cooler
/prawn gear/bucket of cannon balls in the cuddy/ WOT is 5400 rpm @ 38 mph. She sounds good at that rate, but an easy cruise is 4600 @ 32 mph give or take.
These boats are so light, 1250 lb for the hull, I can plane around 12 mph and would never have to "punch" it to get up. If I did, buddies and gear would be leaving over the transom.
I've got an Arima SeaChaser 17, which is 200 lb lighter than your SeaRanger. 2000-115 v-4 2 stroke Johnson, running a Viper Stainless prop, 13 7/8 X 17 (3 blade). 3 guys, full gas/extra gas/full cooler
/prawn gear/bucket of cannon balls in the cuddy/ WOT is 5400 rpm @ 38 mph. She sounds good at that rate, but an easy cruise is 4600 @ 32 mph give or take.These boats are so light, 1250 lb for the hull, I can plane around 12 mph and would never have to "punch" it to get up. If I did, buddies and gear would be leaving over the transom.
SeaRanger, I've been holding off replying here until I had some definite #s for you.
I've got an Arima SeaChaser 17, which is 200 lb lighter than your SeaRanger. 2000-115 v-4 2 stroke Johnson, running a Viper Stainless prop, 13 7/8 X 17 (3 blade). 3 guys, full gas/extra gas/full cooler/prawn gear/bucket of cannon balls in the cuddy/ WOT is 5400 rpm @ 38 mph. She sounds good at that rate, but an easy cruise is 4600 @ 32 mph give or take.
These boats are so light, 1250 lb for the hull, I can plane around 12 mph and would never have to "punch" it to get up. If I did, buddies and gear would be leaving over the transom.
I've got an Arima SeaChaser 17, which is 200 lb lighter than your SeaRanger. 2000-115 v-4 2 stroke Johnson, running a Viper Stainless prop, 13 7/8 X 17 (3 blade). 3 guys, full gas/extra gas/full cooler
/prawn gear/bucket of cannon balls in the cuddy/ WOT is 5400 rpm @ 38 mph. She sounds good at that rate, but an easy cruise is 4600 @ 32 mph give or take.These boats are so light, 1250 lb for the hull, I can plane around 12 mph and would never have to "punch" it to get up. If I did, buddies and gear would be leaving over the transom.
Fins -n- Skins
Well-Known Member
Hey Ranger i just talked to Marc from Runabout as he is replacing my steering cable[V] He said you should be getting more rpm's but would have to see what's up.
Sea Ranger
Active Member
Thanks Fins -n- Skins, I talked to your outboard mechanic and he shed a lot of light on this, In a nut shell he said if the motor is running fine at 4500 rpms that nothing is wrong as it is within the min rpm range however it will tend to lag on take off. He said this will not blow up the motor as long as there is nothing else wrong, in fact with keeping with the prop that is already on there that I will end up with more mph and less rpms. Where as if I was to switch the prop to a 15 pitch that would look after the rpm issue and get me out of the hole faster but I would be running at a higher rpm to achieve the same mph. He said if I did a lot of sking then I might want to change props but I don't ski. Stainless Steel is also a truer prop but is also damaged easier, I find it funny that I have talked to two different mechanics and they both say that if I can run on plane at 4500 rpms that there is nothing wrong with my outboard and yet some people on this site at hell bent on the fact that I am running the wrong prop. I know they mean well and thanks for that but their not mechanics. Thats one thing I've learned. I will try a 15 pitch prop to see which I like better.Thanks to all.... Steve.
And remember....Keep your tip up!!!
And remember....Keep your tip up!!!
Degree of Freedom
Active Member
FYI...Island Fish Lifter is a boat mechanic, and a good one.
Sea Ranger
Active Member
I would like to thank all who had the patiants to educate me on the matching of a prop, motor and boat. Without you I would have never known the differaence in prop sizes. I have been listening and I will be trying out different props till I get my revs up a bit more. Thank-you.
And remember....Keep your tip up!!!
And remember....Keep your tip up!!!
Gunsmith
Well-Known Member
You have not done an important test, verify your actual motor rpm as shown on the tach to the rpm the motor is actually doing.
It is very easily done and all the mech has to do is to hook up a timing light and if he is any kind of mechanic he will have a timing light with a tach on it and other important info on it.
You absolutely should not trust your tach unless it has been checked in such a manner.
YOUR MECHANIC IS NOT CORRECT WHEN HE SAYS THAT A s/s PROP IS EASIER TO BREAK, IT IS THE WEAKER PARTS THAT BREAK SUCH AS PROP SHAFTS GEARS,ETC. An aluminum prop will break first and should be used in situations where there is much debris in the water.
Listen or not at least verify your tach is working right.[^]
It is very easily done and all the mech has to do is to hook up a timing light and if he is any kind of mechanic he will have a timing light with a tach on it and other important info on it.
You absolutely should not trust your tach unless it has been checked in such a manner.
YOUR MECHANIC IS NOT CORRECT WHEN HE SAYS THAT A s/s PROP IS EASIER TO BREAK, IT IS THE WEAKER PARTS THAT BREAK SUCH AS PROP SHAFTS GEARS,ETC. An aluminum prop will break first and should be used in situations where there is much debris in the water.
Listen or not at least verify your tach is working right.[^]
Island Fish Lifter
Well-Known Member
quote:Originally posted by Gunsmith
You have not done an important test, verify your actual motor rpm as shown on the tach to the rpm the motor is actually doing.
It is very easily done and all the mech has to do is to hook up a timing light and if he is any kind of mechanic he will have a timing light with a tach on it and other important info on it.
You absolutely should not trust your tach unless it has been checked in such a manner.
YOUR MECHANIC IS NOT CORRECT WHEN HE SAYS THAT A s/s PROP IS EASIER TO BREAK, IT IS THE WEAKER PARTS THAT BREAK SUCH AS PROP SHAFTS GEARS,ETC. An aluminum prop will break first and should be used in situations where there is much debris in the water.
Listen or not at least verify your tach is working right.[^]
Now theres some solid advice! Good job gunsmith.
Fill the dam tub!
I've owned boats since 13 years old (I'm 50 now) and do my own mechanical work, including complete tear downs and rebuilds. It is more preferable to have your engine achieve the higher end of the manufacturers recommended rpms than the lower end. The result will be less wear and tear and longer engine life when operated at normal cruise speeds.
wolf
Well-Known Member
Me thinks your wasting your time Rollie, totally agree with you!!! on my outboard I spent almost a whole day and tried 8 different props to see which gave me my max rpm/speed/and out of hole tests and recorded it all and then took all my findings to a well known prop guy and he suggested which was best and went with what we both agreed upon.
Wolf
Wolf
Sea Ranger
Active Member
Thanks Pro, its good to know that, in fact that was a question I had.
And remember....Keep your tip up!!!
Sea Ranger
Active Member
Wolf, I'm sorry you think this is a waste of time. Lucky for me there are people on here who will take the time to help someone who has never had a prop problem before.
And remember....Keep your tip up!!!
Sea Ranger
Active Member
I will get this done.... thanks.quote:Originally posted by Gunsmith
You have not done an important test, verify your actual motor rpm as shown on the tach to the rpm the motor is actually doing.
It is very easily done and all the mech has to do is to hook up a timing light and if he is any kind of mechanic he will have a timing light with a tach on it and other important info on it.
You absolutely should not trust your tach unless it has been checked in such a manner.
YOUR MECHANIC IS NOT CORRECT WHEN HE SAYS THAT A s/s PROP IS EASIER TO BREAK, IT IS THE WEAKER PARTS THAT BREAK SUCH AS PROP SHAFTS GEARS,ETC. An aluminum prop will break first and should be used in situations where there is much debris in the water.
Listen or not at least verify your tach is working right.[^]
And remember....Keep your tip up!!!
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