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Old 19 May 2015, 13:48   #31
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Even though it might not be worth the expense, could a hydrofoil possibly be beneficial?

I am not sure if I have my plate up high enough for it to work properly, though. Or even if a Permatrim plate can be spaced up about an inch to artificially raise it to the keel line.

Here's the clearance I have with the 1-1/4" shim: Imgur Photo Link
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Old 19 May 2015, 15:33   #32
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Height looks OK, you shouldn't be far off ideal with that.

Just for comparison here is a pic of mine (zodiac also). It's trimmed on hole 3 of 5 which lines the ventilation plate about parallel with the keel line.
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Old 19 May 2015, 17:36   #33
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Test as you've now got it & see what difference it makes before doing anything else.
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Old 26 May 2015, 15:06   #34
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So I took the Zodiac out for a third time...

I changed the fuel line to a genuine Quicksilver quick connect style line, and replaced the EPA cap on my Attwood tank with a Moeller venting cap (which fit just fine). It was the pre-assembled 8' line with the standard 1/4" thread on one end, and quick connect engine fitting on the other. Had a full tank, and verified that the engine side connector was snapped in place, but the primer bulb just wasn't firming up. Even the crappy Attwood line I had before would firm up pretty quickly after a few squeezes, but this one just wasn't having it. The engine managed to start when i hit the electric starter, though. After leaving the dock and meandering through the no-wake zone to head out, the engine was "sneezing", and continued to do so at times when we were running at less than 1/3 to 1/2 throttle. Could this be caused by a bad bulb????

I also noticed a slight squeal coming from the engine when bringing it down from full throttle that'd last a couple seconds.

The engine should be okay mechanically, I've had it inspected by multiple reputable shops. The only thing that's been done to it recently is the installation of a Permatim hydrofoil (since the inflatable I have it on wasn't planing), and me installing a lower pitch (7 pitch) prop from the stock 9 to bring the RPM's up a little. I sprayed everything with Corrosion X oil, including the thrust washer, spines, prop, shaft spines, and nuts before putting everything on and cranking the prop nut down. I should also note that I'm now using a 1-1/4" white oak shim to get the lower unit up higher.

Any thoughts??? Though the boat seems to be planing just fine now (thank the lord).

EDIT: Just tried squeezing the bulb with the line connected to the tank but not the engine, and it firmed up... Weird....
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Old 26 May 2015, 15:18   #35
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Just as an aside: Does anyone know what the tach pulses per revolution should be set at for this engine to get my Trail Tech TTO portable tach to read correctly? The only choices are 0.5, 1, and 2 PPR.

http://gallery.trailtech.net/media/i...our-manual.pdf
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Old 26 May 2015, 18:58   #36
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Each plug will fire (pulse) once per revolution. so if you have the tach wire wrapped arround one plug lead then its setting should be 1.
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Old 26 May 2015, 21:05   #37
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I didn't really mention this in my previous post, but after getting the Permatrim foil, shim, and new 7P prop on there the boat handles WAYYYY more responsively. I was able to get right up on plane, turn on a dime under power (and hold the turn), and get up to 19 mph with two souls on board. I didn't move the fuel tank or any gear forward, I kept everything aft at the stern. I was getting 21 mph with just me on board prior to these add-ons, only a 2mph loss with an extra person on seems like proof enough my performance isn't suffering due to the addition of the hydrofoil.
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Old 27 May 2015, 03:17   #38
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Would have been interesting to know what difference each extra made.

The 'sneezing' sounds like a misfire so check leads & plugs & I wonder if it's a weak fuel mixture causing it to spit back through the carb.

I have two fuel lines, each with a bulb & have never had a bulb NOT pump up hard providing there was enough fuel in the tank & there were no airleaks at any of the connections or damage to the pick up hose inside the tank.

No idea what the squealing sound is, but squealing noises from engines aren't usually good.
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