Glossary . . . Engine Related  

Dialectic Shield, Pilot Air Screws, Big Bore, CC'ing Heads, Choke Solenoid, Correcting Squish, Crank Plug, Decked Block, Degreeing a Motor, Diffuser, Exhaust Can, Fuel Pumps, Goki Starter, Primer Bulb, Ported Motor, Rev Limiter, Rods - Bottom Guided, Rods - Top Guided, Shaved Head


Topic:                Engine Related Items


Real Name:        Dialectic Shield

Common Name:  Air Intake, Carb Shield, F/A Separator

Function:            Collects fuel/oil mist and drains it back into engine via vacuum line connected to the bottom

Pic: 

Notes:                

  1. Early 50hp used same as 50hp Outboard Engines 
  2. ---- Gaskets extremely important to keep shield from contacting/dragging on air-mixture screws

Real Name:        Screw, Pilot Air

Common Name:  Idle Mixture Screws, Idle-Air Screws

Function:            Allows operator to increase or decrease air-bleed volume

Pic: 

Notes:                

  1. Early 50hp motors had screws with the large flatblade head
  2. 60hp engines had smaller head that is easily stripped
  3. Recommended setting is 1 3/4 turns out from fully-seated (lightly) position

Real Name:        Big Bore

Common Name:  Stroked, Big Bore, Hogzilla, Big 88

Function:            Using bore-sizes that are larger than the factory (suzuki) has recommended. Bigger bores increase displacement and increase TORQUE. Without modifying the electrical system though, increased rpm is not one of the benefits. 

Pic:  Here's a couple of pics to illustrate the difference in bore sizes

Notes:                

  1. Early 50hp motors are 82mm bore with .25 and .5 mm oversize available from Suzuki
  2. 60hp engines have 84mm bores with .25 and .5mm oversizeavailable from Suzuki
  3. 86mm pistons are available from Tohatsu. They are a 3-ring CAST design and are very expensive. Also, they require different size thrust washers - available from ProX
  4. 86 and 88mm pistons are also available from Wiseco. They are FORGED and expensive - and also require different size thrust washers. They also require a proper warmup period every time out. The machinist also need to provide extra clearance for these pistons in the bore. Finally, the aluminum at the bottom of the bore needs to be undercut so that it won't seize the piston skirts.

Real Name:        CC'ing Heads

Common Name:  Air Intake, Carb Shield, F/A Separator

 


Real Name:        Choke Solenoid

Common Name:  Choke Solenoid, Air Intake, Carb Shield, F/A Separator


Real Name:        Correcting Squish Band

Common Name:  Cutting Squish Band, Blueprinting Heads

Function:            Corrects the shape of the squish band part of the cylinder head to match the pistons properly. The idea is to get the angle cut properly so that the air/fuel mixture is pushed towards the center of the combustion chamber as the piston is coming up toward top-dead-center. Getting this correct increases the velocity - and thus creates more power.

Pic:                    Here's a 50hp head that's been decked and cut correctly.

And here's a 60hp head that's shaved and polished. Does polishing increase power? I dunno - but that head was run for a year or more and look how clean it is.

Here's a few more heads.

 

Here's a couple of beauties. The difference in these two is BORE SIZE. Also, one has had the casting around the cooling passages cleaned-up a bit.

 


Real Name:        Crank Plug

Common Name:  Crank Plug, Welch Plug, That missing plug

Function:            Helps keep water out of 60hp engine. Learn more about it here


Real Name:        Decked Block

Common Name:  Decked Block, Machined Block, Shaved Block


Real Name:        Degree-ing a Motor

Common Name:  Degreeing a motor, measuring port timing

Notes:                 To find this info . . . go here


Real Name:        Diffuser, Exhaust

Common Name:  Diffuser, Exhaust Cone, 

Notes:                 There have been two (2) factory sizes that I know of - and one modified one:

      • 50hp Short Cone
      • 60hp Tall Cone
      • Modified Wetbike Brian Cone


Real Name:        Muffler

Common Name:  Exhaust Can

Notes:                 There were several different sizes of these cans?

        • Early 50hp (shortie) with copper tube (90 degree)
        • Late 50hp
        • Early 60hp (shortie)
        • Factory Modified Tall Can (welded-on straps)
        • Factory Tall Can
        • 1992 Can (tallest of all)

 


Real Name:      Fuel Pumps

Common Name:  Fuel Pumps

Article:                How To - Identify that Fuel Pump

Pics:


Real Name:        Goki Starter

Common Name:  Goki Starter, Yoki Starter


Real Name:        Primer Bulb

Common Name:  Primer Bulb, Fuel Bulb, Squeeze Bulb

Function:            Allows operator to pull fuel from tank and fill fuel filter, pump and carburetors. Allows for easy starts.

Pic: 

Notes:                


Real Name:        Ported Motor

Common Name:  Ported Motor


Real Name:        Control Unit

Common Name:  Rev Limiter


Real Name:        Bottom Guided Rods

Common Name:  Bottom Guided Rods

Function:            Allows connecting rods to be guided by crank pin rather than the piston. Big end of connecting rod is limited side-to-side on its movement by the thrust washers that are on each side lower rod end. Upper end of rod is allowed to float side-to-side.

Pic: 

Notes:                

  1. All 60 and 65 hp Suzuki 2-cyl engines are "top-guided"
  2. Thrust washers are hardened and ground
  3. Most all high-performance 2-stroke engines since the mid 1980's are now top-guided

Real Name:      Top Guided Rods

Common Name:  Top Guided Rods

Function:            Allows connecting rods to be guided by piston rather than the crankshaft. Big end of connecting rod floats on the crank pin while the top end of the rod is limited side-to-side on its movement by the thrust washers that are on each side of the upper rod end.

Pic: 

Notes:                

  1. All 60 and 65 hp Suzuki 2-cyl engines are "top-guided"
  2. Small end of connecting rod looks like a castle to allow additional oil circulation to the thrust washers
  3. Thrust washers are countersunk, hardened and ground
  4. Most all high-performance 2-stroke engines since the mid 1980's are now top-guided

 


Real Name:        Milled Cylinder Head

Common Name:  Shaved Head, Milled Head, High-Compression Head, etc.

Function:            Milling the cylinder head allows for a nice and flat sealing surface - and - an increase in compression. Obviousy the amount of compression increase depends on how much is milled off of the head.

Pic: 

Notes:                

  1. Increasing the compression increases the engines TORQUE (usable power)
  2. Increasing the compression increases the amount of HEAT the engine generates
  3. A little is good, a lot is dangerous
  4. Proper planning is required before considering this modification
  5. Decking the block and milling the head can have unintended consequences (50hp head bolts will now bottom-out in the bores - requiring shorter headbolts or thicker spacers)
  6. When raising the compression above 165lbs it's recommended to hook up a water pisser - to drain away any air bubbles that may be created/trapped and prevent overheating
  7. Milling the 60hp heads usually requires the removal of the cylinder head cover (real pain in the azz)

 

 

 09/12/2017

Copyright 2012 Capt'n Obveeus

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