More food for thought.......Once again I am not trying to start a pissen' match......That is not my intent....I am attempting to get a very "user friendly inexpensive outboard" for the new RC nitro boater.....
Well , here is the latest progress report on the " inexpensive outboard nitro motor project".....
I have learned a lot and I will periodically pass on what I have experienced during this effort.....
This current Corona Virus mess has really curtailed a smooth resolution to this effort....I have run into some purchasing and delivery roadblocks that are going to take some time to resolve......
To date , I have bought and will be testing several different .28 motors....
We have attempted to test the "Hobao" .28 motor and the Hobao rotostart/pull start system is a design nightmare....The Hobao design is different from all the other PTO rotostart/pull start designs on all the other motors I have obtained....If you decide to try this effort my recommendation is stay away from the Hobao motor.....
There a ton of big block SG shaft car motors to pick from so staying away from the Hobao should post no problem for the people who want to join in this approach to nitro RC boating....
Turns out there are several motors that would serve this effort well and all will fit in the Lawless outboard adapter and all have the SG shaft....
These are the displacements of the motors available.... .20 , .21 , .25 , .28 , & .31......I am sure there are more that I just haven't ran into yet...The motors I have all are very well made.....I have had them all apart and my survey of the motors has come to the conclusion that all are of magnificent quality in materials and workmanship....When you think about it all the RC nitro car motors really get tortured by there users....
In fact Novarossi has joined the lower priced .21 rotostart car motor market and it is available on ebay....
https://www.ebay.com/itm/Novarossi-...785162?hash=item2ce7a3130a:g:~u0AAOSwwKNdqVLnI have one of these motors also and have had it apart and my conclusion is "all" the motors I have bought look the same in materials and workmanship.....
What I have learned.......
1] Break in for these car motors is very important....15 or 20% fuel is just fine....In fact these low nitro fuels perform very well and are a lot easier on motor internals....I.E. bearings....Run the motors the way they come out of the box....."DO NOT TAKE OUT HEAD SHIMS".....
2]Patience , patience , patience.....follow the motors manufacturer recommended break in procedure....
3]This is a good idea for all the motors you use in nitro RC boating......get a IR thermometer and use it during break in....
https://www.ebay.com/itm/Autocraft-...537491&hash=item42148fce71:g:AWMAAOSw1g1dL0mr
4]Finding a rotary carb for these motors can be a bit of a challenge.....They are out there....If all else fails find a K&B Black ,Gold or Red and make an adapter for the motor you chose....Choosing a max bore for this effort is not as important as launch and reliable come back to the dock performance....These motors come with slide valve carbs and we are working some throttle linkage...more to follow on this subject.....
The new prototype Zipp tunnel boat is about 90% complete and I should be getting it in about 2 weeks.....Presently my test pond is drained dry and being dredged and the spillway is being rebuilt.....When I get the boat and motor combo ready to run we will get it done somehow.......As long as this effort has interest I will continue going forward......
I am also working on a very quiet small muffler for this effort....more on that later also....
This "Hobao" rotostart / pull start PTO fiasco has really thrown a stick in the spokes of progress here....We will get a video as soon as possible.....
When all this is said and done I will put together a tutorial of all I have experienced and where to get it.....
Well , here is the latest progress report on the " inexpensive outboard nitro motor project".....
I have learned a lot and I will periodically pass on what I have experienced during this effort.....
This current Corona Virus mess has really curtailed a smooth resolution to this effort....I have run into some purchasing and delivery roadblocks that are going to take some time to resolve......
To date , I have bought and will be testing several different .28 motors....
We have attempted to test the "Hobao" .28 motor and the Hobao rotostart/pull start system is a design nightmare....The Hobao design is different from all the other PTO rotostart/pull start designs on all the other motors I have obtained....If you decide to try this effort my recommendation is stay away from the Hobao motor.....
There a ton of big block SG shaft car motors to pick from so staying away from the Hobao should post no problem for the people who want to join in this approach to nitro RC boating....
Turns out there are several motors that would serve this effort well and all will fit in the Lawless outboard adapter and all have the SG shaft....
These are the displacements of the motors available.... .20 , .21 , .25 , .28 , & .31......I am sure there are more that I just haven't ran into yet...The motors I have all are very well made.....I have had them all apart and my survey of the motors has come to the conclusion that all are of magnificent quality in materials and workmanship....When you think about it all the RC nitro car motors really get tortured by there users....
In fact Novarossi has joined the lower priced .21 rotostart car motor market and it is available on ebay....
https://www.ebay.com/itm/Novarossi-...785162?hash=item2ce7a3130a:g:~u0AAOSwwKNdqVLnI have one of these motors also and have had it apart and my conclusion is "all" the motors I have bought look the same in materials and workmanship.....
What I have learned.......
1] Break in for these car motors is very important....15 or 20% fuel is just fine....In fact these low nitro fuels perform very well and are a lot easier on motor internals....I.E. bearings....Run the motors the way they come out of the box....."DO NOT TAKE OUT HEAD SHIMS".....
2]Patience , patience , patience.....follow the motors manufacturer recommended break in procedure....
3]This is a good idea for all the motors you use in nitro RC boating......get a IR thermometer and use it during break in....
https://www.ebay.com/itm/Autocraft-...537491&hash=item42148fce71:g:AWMAAOSw1g1dL0mr
4]Finding a rotary carb for these motors can be a bit of a challenge.....They are out there....If all else fails find a K&B Black ,Gold or Red and make an adapter for the motor you chose....Choosing a max bore for this effort is not as important as launch and reliable come back to the dock performance....These motors come with slide valve carbs and we are working some throttle linkage...more to follow on this subject.....
The new prototype Zipp tunnel boat is about 90% complete and I should be getting it in about 2 weeks.....Presently my test pond is drained dry and being dredged and the spillway is being rebuilt.....When I get the boat and motor combo ready to run we will get it done somehow.......As long as this effort has interest I will continue going forward......
I am also working on a very quiet small muffler for this effort....more on that later also....
This "Hobao" rotostart / pull start PTO fiasco has really thrown a stick in the spokes of progress here....We will get a video as soon as possible.....
When all this is said and done I will put together a tutorial of all I have experienced and where to get it.....
