1957 Lark 35hp - delayed pumping?

[lindy46]

Got my pontoon back in the water today with my '57 Lark on it. Over the winter, I replaced the L/U seals and water pump impeller. I noticed today that it takes 30-60 seconds before it starts pumping water after the engine is started. Once it starts pumping, it puts out plenty of water. Before I replaced the impeller, it started pumping almost immediately. Any thoughts?

 

[tashasdaddy]

Re: 1957 Lark 35hp - delayed pumping?

have you tried it several times, the vanes could have been backwards, but they will usually right themselves.

 

[lindy46]

Re: 1957 Lark 35hp - delayed pumping?

Yup - tried several times and even went out and ran it at full throttle. I'm pretty sure the vanes were the right direction but anything is possible.

 

[EN2]

Re: 1957 Lark 35hp - delayed pumping?

just a thought, how did your water tube grommets look?

 

[lindy46]

Re: 1957 Lark 35hp - delayed pumping?

just a thought, how did your water tube grommets look?

They were fine

 

[F_R]

Re: 1957 Lark 35hp - delayed pumping?

That motor should start pumping almost immediatly. Certainly not 60 seconds. Something isn't right. We can continue to guess, but that doesn't get the job done. Start with a second look at the water pump.

(It IS deep enough in the water, right?

 

[lindy46]

Re: 1957 Lark 35hp - delayed pumping?

(It IS deep enough in the water, right?

Duh - am I stupid or what? When I did all the lower unit work this winter, I also converted the motor from long shaft to short shaft. Well, it wasn't deep enough in the water! Dropped the transom down a few inches so the entire L/U is submerged and it works fine.:redface: Thanks F_R - sometimes it takes someone else to point out the simplest and most obvious solution to the problem!