35 HP Chrysler loses forward propulsion at certain throttle setting

Hey guys I am looking for confirmation before I do something drastic to my prop to test a theory.<br />When I get to a certain throttle position I lose forward motion. The engine tachs out and <br />it is if the prop stops turning. I have a very slow speed and was able to make it back to the ramp under power<br />although it was slow going. I pulled the prop and the shear pin is still intact. I have the same problem in reverse.<br />this is a 76-77 35 HP chrysler. the prop spline shaft is in good shape so I dont think that is slipping. It does not show wear.<br />I have been told that this year motor has a prop that includes a rubber gasket between the prop housing and the<br /> center that fits on the spline shaft and the problem could be that the prop is slipping on the worn rubber piece.<br />I stuck a screwdriver between the flywheel and the starter to prevent the flywheel from moving and could move<br />the prop a revolution in both directions. It wasn't easy to move it but it wasn't too hard either.<br />I was told that a down and dirty way to prevent this is to drill at least three screws through the prop housing <br />and bite into the rubber to prevent the slipping, then perform the screwdriver, flywheel trick again and the prop <br />shouldn't move. Does this sound right?

Re: 35 HP Chrysler loses forward propulsion at certain throttle setting

the rubber you are refering to is called a hub you need to have it replaced

Re: 35 HP Chrysler loses forward propulsion at certain throttle setting

it may work to drive screws into the hub, but if you hit something in the water. what else would be damaged? I think a prop shop shoud get the job of fixing it properly!<br />Richard

Re: 35 HP Chrysler loses forward propulsion at certain throttle setting

Thanks for the response. I guess the theory is correct then? Where can I get a prop for this year motor?

Re: 35 HP Chrysler loses forward propulsion at certain throttle setting

Hi StumpJumper, I bought a prop for a 45hp chrysler from this place http://www.propcopropellers.com/us Marine.htm <br /><br />It was the best deal I could find and I had it within 3 days. I paid 73.00 including shipping<br /> <br />Rich

Re: 35 HP Chrysler loses forward propulsion at certain throttle setting

Get yourself the correct part number and check on e-bay. Just a suggestion.<br /><br />Dymo