Impeller screws

[All U Get]

Hi all,

Are all screws for the cover plates on impellers the same size thread and guage. My Northern Lights generator has nice hex heads on the screws. I would like to put similar screws on the Perkins engine instead of the slotted screws.

 

[dlochner]

Probably not, unless the water pumps are the same. Take one screw out of the Perkins pump and match the thread for a hex head.

 

[JoeWhite]

I replaced with Allen head screws

 

[kloudie1]

It is a good modification, I changed mine several years ago to stainless hex head.. I took one to the hardware place and matched thread and length.

 

[sailcapt340]

They aren‘t. A few years back a friend had a 340 with a similar issue. I had a set of screws from my original impeller housing plate from when I changed over to a Speed Seal Plate. We tried them but they are just that little bit different. He went with Allen heads as Joe stated.
He kept a Allen head wrench with a handle attached wired onto the unit so he didn’t have to go looking through his tool box for the right size when he needed it.

 

[All U Get]

Went to the local hardware store and found Allen head, 8/32 thread size to match. Now I have to find my Tef Gel on the boat.

 

[WayneH]

Went to the local hardware store and found Allen head, 8/32 thread size to match. Now I have to find my Tef Gel on the boat.

The Tef Gel is not where you left it. Mine keeps moving around, playing hide and seek...... and winning.

 

[dlochner]

The Tef Gel is not where you left it. Mine keeps moving around, playing hide and seek...... and winning.

Be careful, the tubs have an affinity for taking a dip. Unfortunately they don't know how to swim.

 

[capta]

Hi all,

Are all screws for the cover plates on impellers the same size thread and guage. My Northern Lights generator has nice hex heads on the screws. I would like to put similar screws on the Perkins engine instead of the slotted screws.

To the best of my recollection most of the screws are 1/4 20. They are for sure on the seawater pump on your Perkins.

 

[All U Get]

Went to the local hardware store and found Allen head, 8/32 thread size to match. Now I have to find my Tef Gel on the boat.

The 8/32 by 3/8 long fit perfectly. My wife helped get half of them started where my hand couldn’t get in between the hoses. (Of course it faces aft and has an oil pressure sending unit three inches away.). I borrowed my neighbors TefGel because he just bought it and knew where it was. I’ll leave all the old screws in a baggie for the next owner.

 

[garymalmgren]

I’ll leave all the old screws in a baggie for the next owner.

Be sure to label them, "Important. Do not throw out."
But don't mention what they are actually for.

 

[WayneH]

I’ll leave all the old screws in a baggie for the next owner.

Be sure to label them, "Important. Do not throw out."
But don't mention what they are actually for.

While the yard was repairing the hurricane damage to my boat, the Admiral and I did several projects and upgrades to the interior. That involves removing screws and wood parts. The screws went into separate baggies which were taped to the wood pieces they went with. The wood pieces were marked on the back side as to where they go back. During the course of the retrofit, several of the baggies came unstuck from their wood pieces. And the baggies were not marked. "Do these screws go with the forward trim piece in the quarterberth or the aft trim piece in the v-berth?" ARGGGG!!!!!