Oil Injection Pump-Dismantled

sam am I

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Jun 26, 2013
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If anyone has ever been curious, I was anyway.


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racerone

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Dec 28, 2013
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Re: Oil Injection Pump-Dismantled

It is a beautifully engineered pump !----But it is driven by a plastic gear inside the engine.
 

Texasmark

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Dec 20, 2005
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Re: Oil Injection Pump-Dismantled

How about Phenolic? I haven't looked at mine but I did remove the drive shaft several years ago and went to pre-mix. The phenolic, cut for gears, is a fabric reinforced carbolic acid resin that is extremely durable. I have seen gears made for other things that were many 10's of years old and were still in excellent condition. I overhauled my 1 ton Ford van once with the 300 cu in. L6 and guess what: The gear that drives the camshaft from the crankshaft (no chain on the L6 like on the V8) was Phenolic. No telling how many million units were produced.

I don't have a problem with it as a driver. The reason I went to pre-mix was because I had no way of knowing if it quit pumping, other than an engine siezure, and my engine had passed 10 years of age. I just feel better this way.

In looking at the precision parts and all, no telling what that baby sells for and how much it added to the cost of the engine.

My 2c,
Mark
 

racerone

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Re: Oil Injection Pump-Dismantled

The drive gear on Mercury oil injection is NOT phenolic !
 

wired247

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Oct 8, 2011
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Re: Oil Injection Pump-Dismantled

Yeah, I dont know why everyone calls that stuff phenolic. They are definitely not phenolic formaldehyde resin based. They are a black plastic composite but they are not phenolics.
 

Texasmark

Supreme Mariner
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Re: Oil Injection Pump-Dismantled

As I said I haven't seen mine but rumor had it that it was. So much for rumors and Phenolic and better supports my reason for disabling mine.

Mark
 

racerone

Supreme Mariner
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Re: Oil Injection Pump-Dismantled

I have seen more than one of these gears stripped and no longer driving the pump.----Rebuilding a 135 hp at the moment and gear shows signs of overheat.-New gear is on the work bench.
 

Texasmark

Supreme Mariner
Joined
Dec 20, 2005
Messages
14,794
Re: Oil Injection Pump-Dismantled

Anybody have a picture of one?
 

wired247

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Oct 8, 2011
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Re: Oil Injection Pump-Dismantled

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