I have an Atomic 4 in my 1968 Pearson Wanderer 30. It was installed as a new engine in 1983.
The absolutely best resource I have found on the web for Atomic 4 info is Moyer Marine
and the companion forum
. You can find pretty much everything you could possibly want to know about maintaining and servicing the A4, including doing a complete overhaul
. Don Moyer publishes and sells an overhaul
manual that shows you how to do everything.
They also rebuild
A4s and sell all kinds of A4 parts
that you pretty much can't get anywhere else.
Originally Posted by Adelie
I have heard of a number of upgrades for the A4
1.fresh water cooling
2.crankcase ventilation kit
3.electric fuel pump
4. in-line fuel filter
5. electronic ignition
6. oil filter
7. wet exhaust
What are people's opinions about these. The concensus I have heard for each is:
1. Worthwhile, extends life of engine
2. Conditional, worthwhile if you have an oil smell problem when underway.
3. No feedback, but seems to me that it allows you to put fuel tank
below engine preventing siphoning of excess fuel into various engine parts while sailing.
4. Minimal feedback but filtering fuel seems like a good idea generally but not absolutely required as with diesel.
5. Mixed. Generally worthwhile as less maintenance of the ignition system is required.
6. No feedback. Seems like a good idea, but wasn't designed in to begin with. Was there some rationale passed on by the original designers or was it just an upfront economics issue?
7. Generally worthwhile. Quieter and no really hot mainfolds running long distances thru the boat. Problems with back flooding if engine doesn't start in the first several trys.
Any feedback from this group?
I agree with all of the above. Fortunately for me, the previous owner of my boat did several of these already. He did the following:
fuel pump - not only is this a benefit as you can locate it where you want, but it does away with the leaking and failing mechanical pumps.
Electronic ignition. I think this is a huge positive. No longer have to worry about points and condensor.
In-line fuel filter - it is a carburetted engine, so this is a good idea anyhow to prevent clogged jets.
It has a Vetus water-lift exhaust; I don't know when it was installed, but it works just fine.
I don't know about the crankcase ventilation; I'll have to look into that.
But for sure, the next thing I would like to do to it is to install fresh water cooling.