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Search: Posts Made By: Tom W Clark
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Today, 06:24 PM
Replies: 12
Views: 140
Posted By Tom W Clark

Spark at idle is not the same as spark at speed,...

Spark at idle is not the same as spark at speed, under load.
Today, 05:57 PM
Replies: 12
Views: 140
Posted By Tom W Clark

Claiming good spark while simultaneously noting...

Claiming good spark while simultaneously noting the spark plug is soaking wet does not jibe.
Today, 05:41 PM
Replies: 12
Views: 140
Posted By Tom W Clark

FYI, hitting return *twice* will create a new...

FYI, hitting return *twice* will create a new paragraph...
Today, 05:40 PM
Replies: 12
Views: 140
Posted By Tom W Clark

Power pack. Is the replacement you used an...

Power pack. Is the replacement you used an aftermarket part?
Today, 09:36 AM
Replies: 21
Views: 1,079
Posted By Tom W Clark

A good bow lifting prop certainly will raise the...

A good bow lifting prop certainly will raise the hull out of the water more, reducing wetted surface and drag, and allowing more boat speed.

Choosing the right prop must be fine hand in hand with...
Yesterday, 04:45 PM
Replies: 85
Views: 3,533
Posted By Tom W Clark

Two comments: - The propeller mounting...

Two comments:

- The propeller mounting hardware looks funny (eccentric). Are you sure you’re using the correct spacer washer under the prop nut?

- The trim tab is set hard to starboard. That is...
Yesterday, 12:57 PM
Replies: 2
Views: 154
Posted By Tom W Clark

PowerTech! offers several different types of...

PowerTech! offers several different types of hubs, including conventional press-in rubber, square bore (Flo-Torq style) and Cushion-Lok.

Their Cushion-Lok hubs have been used for almost two...
Yesterday, 12:25 PM
Replies: 0
Views: 158
Posted By Tom W Clark

Tie Bar

Teleflex SeaStar tie bar. This tie bar was used with twins on my 1989 Whaler spaced 29-3/4” o.c. Obviously it can be shortened.

I suggest two new rod ends be used; one of the originals is...
Yesterday, 08:54 AM
Replies: 43
Views: 1,661
Posted By Tom W Clark

Batteries don’t fail all of a sudden, they left...

Batteries don’t fail all of a sudden, they left you know when they’re getting old and growing week.

The huge range of expected life of batteries here most likely represents the difference in how...
Yesterday, 08:47 AM
Replies: 7
Views: 221
Posted By Tom W Clark

A 1979 Mercury 70 does not have a primer, it has...

A 1979 Mercury 70 does not have a primer, it has an electric choke with a manual override.

Use the manual override the next time you try a cold start and see if that makes a difference. That would...
10-24-2020, 06:15 PM
Replies: 10
Views: 308
Posted By Tom W Clark

That is not a binnacle mount control, it is a...

That is not a binnacle mount control, it is a side mount control. The most sensible thing to do is to build a mounting plate that corrects for the angle, then screw that to the hull and attach the...
10-24-2020, 06:12 PM
Replies: 15
Views: 339
Posted By Tom W Clark

Did you buy this boat recently?

Did you buy this boat recently?
10-24-2020, 05:54 PM
Replies: 6
Views: 304
Posted By Tom W Clark

Why reinvent the wheel? The brass drain tubes are...

Why reinvent the wheel? The brass drain tubes are so easy to install in transoms, and the tool cost next to nothing. Do not be afraid.
10-23-2020, 12:24 PM
Replies: 38
Views: 844
Posted By Tom W Clark

Looks like regular ol’ spark plugs to me. NGK...

Looks like regular ol’ spark plugs to me. NGK ZFR5F to be precise.
...
10-23-2020, 08:50 AM
Replies: 5
Views: 154
Posted By Tom W Clark

If the motor is in the rev limiter at 6450-6600...

If the motor is in the rev limiter at 6450-6600 RPM and 35 MPH, the calculated propeller slip is about 6 percent, which is what I would expect.

Tach is off.
10-23-2020, 08:30 AM
Replies: 5
Views: 154
Posted By Tom W Clark

35 MPH @ 7000 RPM with a 14” pitch prop is...

35 MPH @ 7000 RPM with a 14” pitch prop is possible. That about 12 percent calculated propeller slip, which is a little high, so it is also possible the tachometer is off.

What tach are you using?
10-22-2020, 09:07 AM
Replies: 3
Views: 142
Posted By Tom W Clark

All square bore propellers use the same hub...

All square bore propellers use the same hub insert geometry. Mercury pioneered this with their first Flo-Torq II modular hubs in the late 1990s. Precision Propellers Inc. (now known as Yamaha...
10-22-2020, 08:18 AM
Replies: 3
Views: 142
Posted By Tom W Clark

You can use either the Guardian SQ-Lok 505 or the...

You can use either the Guardian SQ-Lok 505 or the Quicksilver Flo-Torq II, Mercury part # 835274Q 1
10-21-2020, 09:42 PM
Replies: 14
Views: 412
Posted By Tom W Clark

It might, as well as the other two props I...

It might, as well as the other two props I mentioned.

The Painted Stainless Steel has a pressed-in rubber hub, so it’s not as hard shifting, and it does fine on the F150.

The Turbo 1 is a...
10-20-2020, 06:13 PM
Replies: 37
Views: 2,794
Posted By Tom W Clark

After you have ten posts, you can post some...

After you have ten posts, you can post some photos of the boat. Until we have some more info, no meaningful recommendations can be made.
10-20-2020, 12:57 PM
Replies: 9
Views: 454
Posted By Tom W Clark

By all means, have the exhaust kits installed...

By all means, have the exhaust kits installed now, do not wait.

About $600 for the parts and $2,000 labor for each motor.
10-20-2020, 09:01 AM
Replies: 59
Views: 2,506
Posted By Tom W Clark

Table salt sabotage. I doubt that. When you...

Table salt sabotage. I doubt that.

When you hear hoofbeats, think horses not zebras.
10-19-2020, 06:50 PM
Replies: 37
Views: 2,794
Posted By Tom W Clark

A foil / tail is a band-aid that treats the...

A foil / tail is a band-aid that treats the symptom, but does not solve the problem. Most porpoising issues can be solved with the good prop, and improved motor mounting height (the two go hand in...
10-19-2020, 06:13 PM
Replies: 6
Views: 230
Posted By Tom W Clark

The motor will have the month and year of...

The motor will have the month and year of manufacture on the serial number placard.
10-19-2020, 06:11 PM
Replies: 37
Views: 2,794
Posted By Tom W Clark

FYI, what you describe as “bouncing” is more...

FYI, what you describe as “bouncing” is more commonly known as porpoising.
Showing results 1 to 25 of 500
 


 
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