Pump spline engagement depth?

[Jetmugg]

I'm setting up the engine location in my 18' Gullwing. The pump has a Jetaway installed. My question is how much clearance should I allow before the driveline coupler "bottoms out" on the splines. I know that it should not bottom out, but don't know how much clearance to leave.
Any input is aprreciated.
SteveM.

[Heatseeker]

I've been told it should be 1/8" from bottom.
Welcome back!

[Cs19]

I run mine right about 1/16 from the clip, then just removed the clip.The more engagement, the better.
Cs19

[flat broke]

Something important to note here. You don't want to run it bottomed out because in some applications the pump shaft will "walk" forward a little once the impeller starts pulling water. With no slack in the driveline, this could put stress on the thrust bearing in the motor.
Chris

[Heatseeker]

Something important to note here. You don't want to run it bottomed out because in some applications the pump shaft will "walk" forward a little once the impeller starts pulling water. With no slack in the driveline, this could put stress on the thrust bearing in the motor.
Chris
That's what I was told, hence the 1/8". That way there's no possibility of shaft walk to damage the engine's thrust bearing(unless you lose the front pump bearing).

[Jake W2]

Steve put the cupler up aginst the clip then remove the clip.The clip is for a lenco drive shaft.THIS IS THE WAY DUANE SAID TO DO IT.
Jake

[Jetmugg]

I'm glad to hear Duane's method. I was going to call him, but didn't even know that he was back from France yet. Then I saw the Banderlog posts from him.
Thanks again,
Steve.

[American Turbine Man]

DO NOT REMOVE THE SHAFT SNAP RING! Removing the snap ring could cause the impeller and shaft assembly to run into the back of the bowl. If you have a fast boat you could have more than 3100 pounds of force pushing on the impeller when you come off the throttle at high speed. ATM

[Heatseeker]

DO NOT REMOVE THE SHAFT SNAP RING! Removing the snap ring could cause the impeller and shaft assembly to run into the back of the bowl. If you have a fast boat you could have more than 3100 pounds of force pushing on the impeller when you come off the throttle at high speed. ATM
I was wondering if that was such a great idea.
What would the snap ring have to do with a Lenco driveshaft?

[Oldsquirt]

They aren't talking about removing the circlip on the PUMP SHAFT, they are talking about the circlip in the front of a JETAWAY, which is what Jetmugg was asking about.