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I just changed the tilt cylinder seals on my 2010 175 hp optimax. The cylinder will drop down after disconnecting the top pin, allowing you to remove the cylinder top cap. It's not a fun job, but...

I appreciate it. Do you know if Seastar HA5820 is the right tiller kit?

I have a 2010, 175 hp optimax, serial #1B789623, that has a Seastar HC5345 front mounted hydraulic steering cylinder. It rattles and has too much clearance in the tiller bolt. I'd like to replace...

2010 175 hp regular optimax 1B789623. This thing idles rough and stalls when started , but lines out and idles fine after it's warmed up. It runs great at every speed above idle, but runs rough at...

I jumpered the two connections coming from the PCM to the oil tank and the alarm quits sounding. I see on the tank, that there is a switch you can purchase, or the reservoir itself. My question is,...

I have a 2010 175 hp Mercury Optimax 1B789623. It started alarming by beaping 4 times, which I'm led to believe is an oil warning issue. This alarm repeated every two minutes and was consistent...

I found that you can clean the stickiness with rubbing alcohol. All of my reel knobs do this and I think it's because I leave them in the rod box with the boat covered. The hot days here in...

Bo,

I'm surprised that you haven't scooped that one up yet.

This is a hand throttle.

Have a 2010 175 Optimax SN#1B789623. I've been reading that the clearance gap at maximum throttle should be somewhere between .020 and .060 inch. This is the gap between the throttle shaft arm and...

Thanks for the info. Can you use regular fuel line from an auto supply if the line stays out of the sun?

Anybody know the fuel line size? Serial number is 1B789623

I am getting conflicting info on fuel line size. I want to run a continuous line from the primer bulb to the inlet of the pulse pump on my 175hp regular optimax. My mechanic buddy says to use 3/8"...

I've had an interesting issue with my 2010 175 Optimax S#1B789623. It's been making a loud rattling noise when running around 4000 rpm, especially when decelerating. I've looked everywhere to find...

Both batteries I tried were 1000 CCA, so respectfully, I believe the batteries are sufficient. Does the optimax warning system have a warning horn that indicates low voltage?

I have a 2010, 175 HP regular optimax, serial number 1B789623. When i turn the ignition on, the horn beeps one time, like it should. When I crank the engine, the horn quickly beeps again while the...

I have a 98 187 DC elite. The boat still looks like new. Handles like a sports car and takes rough water very well. I repowered in 2010 with a 175 optimax. The boat is a bit tippy with a big guy...

Yes, I do have a hand throttle and not a hotfoot. All linkage is in good shape, and I did replace the roller on the throttle cam recently. I checked the engine harness and cleaned the multipin...

Thanks Don. I did check the idle stop screw gap and it checked out with the piece of paper test. What I don't understand is that the motor is missing at idle and when I shut it down and restart,...

Yes, the bulb is always pumped before starting. Pressure remains in the bulb.

I have a 2010, 175hp regular optimax #1B789623, that has a strange idling issue. When the engine is started, it spits and sputters and occasionally dies. If it dies, I can turn the ignition off and...

I have a 2010, 175 hp standard Optimax serial #1B789623, that I recently changed the stainless reeds to Chris' fiber reeds. The reeds gave me peace of mind and improved the idling, though there's...

The composite reeds sound like the way to go, especially considering what happens when a stainless reed fails. Would the composite reeds have as long a lifespan as the stainless? Are they more...

Thanks for everybody's advice. I will change the stainless reeds out to TDRs and have sent Don an email. Looking at my engine, I was wondering if the air plenum could be removed and positioned to...

175 standard 2010 Optimax 1B789623. The engine idles and runs well except when it's in gear at low idle. Then it seems to miss and sometimes stall. It has done this for a couple years and I have...