503 single carb

by Eddie Postell in 2 Stroke Technical Questions 12 years ago

Hello, just join in today. My Rans S4 has a 503 with a single carb. Don't know much about this engine except it has 24hrs run time. My concern is the prop. It has a 4 blade adj prop. I think that is more than I need. Can the blades be removed to make a 2 blade prop? Perhaps sale, trade for a 2 blade prop.

Picture005Small.jpg (You do not have access to download this file.)

Re: 503 single carb

by bill martin » 12 years ago

bill martin

10 757 0

Hi Eddie,

That does look like a pretty big prop for a 503, but if you are reaching full RPM at WOT it should be OK. I wouldn't recommend removing blades. I'm not sure how that would affect the torque values of the hub bolts with two empty spaces in the hub. That appears to be a "B" gearbox and the mass inertia of that prop may be a bit high for that gearbox. A two or three blade prop would be a better match for the gearbox.

Very nice looking machine!

Bill.

Report

You do not have permissions to reply to this topic.

Related Topics

Title	Category	Replies
Carb sync varies over throttle range	912 / 914 Technical Questions	5
No 912uls carbs in US?!	Rotax-Owner Community	1
503 Year of Manufacture	2 Stroke Technical Questions	1
Rotax 503 Fuel Tank Fitting	2 Stroke Technical Questions	2
New carb socket fits loose	912 / 914 Technical Questions	67

503 single carb

Recent Videos

Safety First!

Prize Giveaway!

Log In/Out

Login