Search found 2165 matches

by John Fenner
Mon Feb 12, 2018 11:19 am
Forum: Aircraft Power Only
Topic: Overheating and detonation
Replies: 33
Views: 920

Re: Overheating and detonation

FWC has 3 new o540 diamondback boats, they run car gas only, they were doing the same as you describe, they had the timing backed down to 20° and no more problem.
by John Fenner
Wed Feb 07, 2018 11:55 am
Forum: Airboat Talk
Topic: Continental 220 gpu air boat starter?
Replies: 4
Views: 303

Re: Continental 220 gpu air boat starter?

85 supra turbo, manual trans has 11 tooth
by John Fenner
Tue Feb 06, 2018 2:16 pm
Forum: Airboat Tech
Topic: Best Compound Leverage Snips for cutting (notching) conduit?
Replies: 12
Views: 507

Re: Best Compound Leverage Snips for cutting conduit?

I oval shape the ends of the tube to get a wider footprint to braze, eyeball the angle, trim it around and done.
by John Fenner
Mon Feb 05, 2018 12:30 pm
Forum: Airboat Tech
Topic: Best Compound Leverage Snips for cutting (notching) conduit?
Replies: 12
Views: 507

Re: Best Compound Leverage Snips for cutting conduit?

I use green, left hand Wiss tin snips with the serrated jaws.
by John Fenner
Mon Jan 15, 2018 7:31 am
Forum: Aircraft Power Only
Topic: 220 FWD Motor Mounts
Replies: 3
Views: 194

Re: 220 FWD Motor Mounts

I do but not quite that style. And these are modified for a longer prop.
by John Fenner
Mon Jan 08, 2018 11:24 am
Forum: Airboat News
Topic: Dave Balman
Replies: 3
Views: 250

Dave Balman

Has passed away. A true gladesman to the extreme degree, also a real fighter for our rights of our Everglades culture and long time president of the AAOF. He will be missed by everyone who had the opportunity to know him. RIP to an iconic figure in our lives!! Please keep Carol, And the Balman famil...
by John Fenner
Sun Jan 07, 2018 10:17 am
Forum: Aircraft Power Only
Topic: BLEEDING LIFTERS 0470
Replies: 5
Views: 236

Re: BLEEDING LIFTERS 0470

I use a pair of vice tongs "c-clamp vicegrips" on the heel of the rocker at pushrod end, be careful not to disturb pushrod washers,seals. Once lifter deflates hold your mouth just right and push rocker shaft through bore while releasing grips, then reclamp to check lash.
by John Fenner
Mon Dec 25, 2017 9:15 am
Forum: Airboat News
Topic: Richard Potter
Replies: 5
Views: 558

Richard Potter

With a sad heart I am posting that one of the founding fathers of the AAOF, former President and long time treasurer and the epitome of the meaning true gladesman has passed away, he will be sorely missed by all, RIP Mr. Potter :salute: :old_glory: :florida:
by John Fenner
Mon Dec 25, 2017 9:03 am
Forum: Airboat Tech
Topic: Lycoming Engine Mounts
Replies: 1
Views: 227

Re: Lycoming Engine Mounts

If you are doing the 4 point up front, go with the factory lycoming mounts and buy the polyurethane Lord mounts from aircraft spruce.
by John Fenner
Thu Nov 23, 2017 9:59 am
Forum: Aircraft Power Only
Topic: Electric tach
Replies: 5
Views: 415

Re: Electric tach

Try a cheap tach that will switch to 6 cylinder mode, i ran one on a gso-540 at the straight mag lead and it worked fine.
by John Fenner
Thu Nov 23, 2017 9:53 am
Forum: Airboat Talk
Topic: zenith carb
Replies: 1
Views: 564

Re: zenith carb

Try Ducarra aviation. 269-684-4440
by John Fenner
Mon Nov 20, 2017 9:05 am
Forum: Aircraft Power Only
Topic: Tach adapter for 520
Replies: 3
Views: 196

Re: Tach adapter for 520

Pm sent
by John Fenner
Mon Nov 20, 2017 8:24 am
Forum: Aircraft Power Only
Topic: Tach adapter for 520
Replies: 3
Views: 196

Re: Tach adapter for 520

Cecil Field in Melbourne Fl
by John Fenner
Mon Nov 13, 2017 8:54 am
Forum: Aircraft Power Only
Topic: Oil temp issue
Replies: 17
Views: 831

Re: Oil temp issue

You have a blowby problem, ring lands are worn on the pistons, and or egg shaped cylinder bores, I would suggest a proper leak down test.
by John Fenner
Tue Nov 07, 2017 8:38 am
Forum: Aircraft Power Only
Topic: Porting cyclinder heads lyc/cont
Replies: 11
Views: 1531

Re: Porting cyclinder heads lyc/cont

We used a flow bench to get best results on a mock cylinder, then matched all the rest to it, sad as hell with all of that plus many other mods, the engine was never truly wrung up, I even doubt the rings got broke in.
by John Fenner
Tue Oct 24, 2017 11:33 am
Forum: Airboat Talk
Topic: New to Airboats need some advice
Replies: 7
Views: 977

Re: New to Airboats need some advice

If you use the search function, there are good combinations to build the strongest and snappiest DD engines to run as strong as a stock aircraft, however the weight difference is key due to iron block and cooling system weight of water.
by John Fenner
Sun Oct 15, 2017 7:27 am
Forum: Aircraft Power Only
Topic: Cont 470
Replies: 5
Views: 755

Re: Cont 470

Measure the stub shaft diameter and length to mounting face, slide a piece of same size pipe into it, long enough that the cover plate holds it in place. If no size pipe available, take solid aluminum dowel and have it machined.
by John Fenner
Mon Oct 09, 2017 12:14 pm
Forum: Aircraft Power Only
Topic: case pressure...
Replies: 4
Views: 673

Re: case pressure...

Well, most likely it doesn't have anything to do with case pressure, vs either too deep of the champher where oring seats under cylinder base, or the thru stud wasn't sealed correctly when case halves were assembled.
by John Fenner
Tue Sep 26, 2017 12:52 pm
Forum: Aircraft Power Only
Topic: 0540 newb
Replies: 6
Views: 753

Re: 0540 newb

Good call, might just need a teardown, cleaning, blast the distributor blocks and check for cracks, and reassembly.
by John Fenner
Mon Sep 25, 2017 12:01 pm
Forum: Aircraft Power Only
Topic: 0540 newb
Replies: 6
Views: 753

Re: 0540 newb

Remove the plug wire harness caps from mags and check for corrosion and or carbon tracing at insulators or from distributor block to case.
by John Fenner
Sat Sep 23, 2017 11:09 pm
Forum: Aircraft Power Only
Topic: 0540 newb
Replies: 6
Views: 753

Re: 0540 newb

Clean or change plugs first.
by John Fenner
Sat Sep 23, 2017 11:07 pm
Forum: Aircraft Power Only
Topic: Oil pump for Continental 0470 GPU needed. Does anyone have one or know where I can find one?
Replies: 3
Views: 499

Re: Oil pump for Continental 0470 GPU needed. Does anyone have one or know where I can find one?

It is not likely pump, add a washer or 2 to pressure relief valve spring, if that doesn't change things when hot, bearings are worn out.
by John Fenner
Tue Sep 19, 2017 4:18 pm
Forum: Automotive Power Only
Topic: 350 sbc dd
Replies: 6
Views: 603

Re: 350 sbc dd

Mild cam is not what you want, an rv cam is what you want or in search feature there is plenty of combinations to read up on.
by John Fenner
Fri Sep 15, 2017 9:30 am
Forum: Airboat Tech
Topic: Has anyone found a way to grease steering cables?
Replies: 10
Views: 1115

Re: Has anyone found a way to grease steering cables?

I've done the similar thing, clamp a hose over mounting threads long enough to clear stem, remove the dust boots first, elevate this end and put a funnel in end of hose, make sure you cant knock funnel out with cable stem full travel, fill funnel with atf or as above mmo, cycle cable in and out or u...

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