220 question ?

[Dreadneck]

What are you 220 guys running ? Av gas or 93 ? And how fast does it burn it ? I went threw $50 of av gas in less than 2 hours .

[scottyroll]

When I had a 220 I ran both fuels and mine personally liked the AVGAS better. With 93 it would diesel, run hotter, and act up. It was baffling to me that an old generator would be picky about what it ate but for some reason those aircraft style engines require higher octane to run reliably and efficently IMO. But at the same time from what I've seen and heard; people have had mixed results meaning that some people have been satisfied by pump-gas and others will swear by av-gas. On the topic of fuel price/consumption, I had a 500holley on my lil 12" gilleo and it drank fuel and oil like a fatty and if I wanted to run about 30 miles round trip it was 50bux just in av-gas. It def wasn't the best tuned rig in history either, but then again the head mechanic was myself and I myself am not a mechanic . I love the nostalgia of an old engine but long story short GPU wasnt for me

[John Fenner]

I never looked at the prop size, nor asked what that thing is turning now that it is hitting on all six good and hard, but what does it turn wide open, and when does the boat plane easy and what rpm is that?

[Dreadneck]

My prop is 68" It gets up on plane pretty easy at about 2000 but I usually go above that to get on plane faster , it gets up to 2800 Rpms really fast and I've never helled it wide up open now that all 6 hit its pretty fast

[John Fenner]

I think once you get the new prop like we discussed, (oh yeah I remember measuring if a 72" would fit now) and set it to the sweet spot you'll gain some mileage. Keep in mind once that boat is on plane you can just cruise it there and save fuel that way too, if it really takes 2000rpm to get it on plane the bottom should be reworked to free things up, it should stay on plane around 12/1400 rpm.

[Dreadneck]

Yea it does stay on plane at about the 12 or 13

[skinny99]

My prop is 68" It gets up on plane pretty easy at about 2000 but I usually go above that to get on plane faster , it gets up to 2800 Rpms really fast and I've never helled it wide up open now that all 6 hit its pretty fast

Do you not know what your engine turns at WOT? If not then you need to find out. Set that warp to 2800-2900 on the trailer for good all around performance. Strap it down, warm it up and hold it WOT throttle. Might be an easy fix if it turns 3200-3300. Add some pitch.

[Dreadneck]

Wot on trailer is about 28-29 with wood paddle prop I'm not holding it open more than a couple seconds motor is still breaking in .

[Gary S]

It was baffling to me that an old generator would be picky about what it ate but for some reason those aircraft style engines require higher octane to run reliably and efficently IMO.

When that engine was made, all gas had lead and no corn in it.

[schmidtav2]

$50 of Avgas should be about 9 gallons, which means you burned about 4 1/2 gallons per hour, pretty good imo.

[broncobill]

$50 of Avgas should be about 9 gallons, which means you burned about 4 1/2 gallons per hour, pretty good imo.
I was thinking the same thing. Not going to get much better than that.

[John Fenner]

It is a wood paddle prop.

[CJB0470]

I have been running a 220 for ten years now, and I stay on av gas.
These engines were built for leaded fuel back in the 60s and that's what your getting with avgas.
They have low compression and do not need high octane they need the lead to keep the head temp down.