View Full Version : Homemade Mud Motor
ORtrapper
11-23-2008, 03:40 PM
Does anyone have any ideas or experience with building their own mud motor? I have seen them made out of briggs engines and rototiller variety engines but I was thinking of building one out of an air cooled snowmobile engine for more power (and cuz I already have one for free). anyone ever tried anything like this?
twisted lines
11-23-2008, 03:53 PM
The new big & bad ones are water cooled, But You may Have something going for The unlimited class when the races come around again......
Highmark
11-23-2008, 04:40 PM
If you are going to use a sled motor. you need to now that that type of engine is designed to operate a dual sheeve type clutch on sleds. if you use this type of motor with out the clutch you will over rev the motor and smoke it or take out the lower end. I have been running sleds for years and lots of experance with them. You really should use a Honda motor or a Breggs type of motor for this application.
HM
Does anyone have any ideas or experience with building their own mud motor? I have seen them made out of briggs engines and rototiller variety engines but I was thinking of building one out of an air cooled snowmobile engine for more power (and cuz I already have one for free). anyone ever tried anything like this?
ORtrapper
11-23-2008, 05:33 PM
what if I used the sheeves and all and made it like the new mud motors with the drive that goes straight down to the water? I see what you are saying about overreving, I ride sleds as well. do you think there would just not be enough drag or "load" from the prop? if a smaller hp motor was used, it may drag it down enough to keep the r's down...just a thought
Highmark
11-23-2008, 07:52 PM
You will have to use the primary clutch in some way. That way you can control the top end rev. What I mean is this. most sled motors are set up to run at a about 8200 rpm or there abouts.that is where there peak
hp is made to run at. so to maintain it. in the primary clutch there are fly weights to control the top end rev.And elevation and temp are factors
in tuning to motor to run at the right temp at 8200 rpm.This is what your going to have to figure out, to use a this type of motor in this application
this type 2 stroke motor has such a high power band, that you will have to deal with on this, to make it work for you.
HM